No more ‘fade to grey’ with new LTP Blackstone sealer & restorer

Featured

UK surface care specialist, LTP has launched a new outdoor sealer and restorer for dark natural stone and artificial stone surfaces. New Blackstone has a water-based, impregnating formulation, which restores the appearance of faded limestone, marble, slate and concrete.  Like all LTP treatments, the new product is manufactured in the UK and is offered alongside expert advice from LTP’s technical team.

Ideal for paths, terraces and external cladding, LTP Blackstone is fast and safe to use and the permanent finish created provides protection against the elements.  It can be applied in multiple coats until the desired colour effect is achieved – from grey to ebony.  On honed surfaces, it is applied with a cloth or sealant applicator and, on rough cut/textured surfaces, with a foam roller or paintbrush.  Surfaces can be walked on four hours after the final application and can be returned to ‘heavy use’ after 24 hours.

New Blackstone is available in one litre and five litre units and is offered as part of LTP’s extensive range of surface maintenance products.  To find out more, please visit http://www.ltp-online.co.uk.  For further information, please contact LTP on tel. 01823 666213 or email info@ltp-online.co.uk

LTP_Blackstone_LR

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Up-to-date advice – in an instant – with new LTP Product Selector

LTP has launched its second-generation Product Selector tool at ltp-productguide.co.uk.  The free online resource – which identifies the correct treatment according to surface type and symptom – has been updated to include the latest tile finishes and related issues.  It now provides even greater scope and support for fixers, contractors and end users, as well as a valuable retail sales aid and training tool.

LTP_Product Selector

Designed to give an answer within one minute, LTP has modelled its Product Selector on “user-friendly railway ticket machines”.  Users select surface type, activity – either cleaning, sealing, aftercare or tooling up – and symptom. They are then instantly shown the product recommendation.  Complementary products can also be displayed and results added to a ‘my choices’ tab. These choices can then be emailed back to the user or customer, for reference later.

The new resource has been deliberately designed in web format, rather than as an APP.  As a result, it can be continually updated without having to issue a complete APP refresh.   The resource is also stand-alone, and not connected to any form of online shop, so retailers can be assured that potential sales are not directed elsewhere.

To access the Product Selector, please visit ltp-productguide.co.uk.  Or, for more information, please contact LTP on tel. 01823 666213 or email info@ltp-online.co.uk

ends  –

For media information and photography, please contact Angela Fitzhugh PR Ltd on tel. (01590) 622521 or email angie@afpr.co.uk

 

 

Keeping pool sides safe

Natural stone surfaces are a popular choice for pool surrounds but if they’re not correctly maintained, they can quickly create a slip hazard.  This is rarely the fault of the stone.  Most materials specified for pool sides have good slip qualities, with a textured surface that provides grip under foot.   Problems are caused by a build-up of residue and a poor cleaning regime, which fails to remove them.

Swimming pools, and leisure environments in general, come in contact with a host of organic contaminants – from food, cosmetics and sun creams, to environmental contaminants like microscopic algae spores and bird droppings.  During maintenance, it’s not uncommon for surfaces to be washed with a detergent and rinsed with pool water, which re-contaminates the surface. Many detergents also fail to break down the residue and a cycle of poor cleaning and residue build-up is created.

In order to remove organic-type residue, you’ll need to use an alkaline-based cleaner.  LTP Grimex is a great option as it will break down these deposits, without damaging the natural stone surface.  For general use, Grimex is diluted 1:5 with water, but a lower dilution of 1:3 may be needed for very dirty pool surrounds.  The cleaner is applied with a sponge or water brush and should be left to act until the dirt releases – this will normally take between 5 and 30 minutes.  The stone should then be thoroughly rinsed with clean water to neutralize the surface.  Scrubber machines can also be used, where suitable.

Another really good option is LTP Mouldex Paving Cleaner.  Like Grimex, it is also an alkaline-based cleaner and it’s especially useful where there’s a greater build-up of environment contaminants, like mould, black spot, lichen, fungus and algae.  It’s applied directly to the stone surface, left to act and should then be thoroughly rinsed with clean water.  As well as removing residue, Mouldex also has an antibacterial and bleaching action, so it helps prevent regrowth and restores light-toned paving to its original colour.

During a deep clean, any limescale residue should also be removed; limescale quickly builds up in wet environments, especially in hard-water areas, and is a magnet for dirt.  If the surface is acid-resistant, an acid-based cleaner like LTP Grout Stain Remover can be used.  Limescale has a similar composition to cementitious grout, so the treatment will remove new deposits, as well as any old installation residues. LTP Grout Stain Remover is diluted according to build-up, applied with a cloth or sponge and the surface should then be thoroughly rinsed with clean water.

1ltr-+-5-Ltr-Grout-stain-re

Straight after an intensive clean is the ideal time to seal the surface, to protect it from stains going forwards. For absorbent stone, LTP External Stone Sealer is a great option; it has an impregnating formulation, so it protects from within, rather than forming a film that could potentially affect anti-slip properties.  It’s also water-based so offers a safe application and it can be applied in damp conditions.  For ongoing aftercare, choose a ph-neutral, phosphate-free cleaner, like LTP Waxwash, which will protect the stone, the sealant and make ongoing maintenance much easier.

LTP-Waxwash5L&1L_Web

Before embarking on a pool deep clean, always check that the solution you’re using is suitable for your surface.  And, once the surface is clean, ensure that a regular maintenance regime is adopted to keep residue build-up under control and surfaces safe all summer long.

For more information and expert advice, please contact LTP on tel. 01823 666213 or email technical@ltp-online.co.uk

 

 

How Do I Remove Rust Stains From Natural Stone?

LTP Rust Stain Remover.

  • Removes surface rust stains
  • Non acidic formulation
  • Removes stains in just 15 minutes

LTP Rust Stain remover ideal for all types of polished and unpolished natural and artificial stone including marble, split face stone cladding, granite, travertine, sandstone, concrete, terracotta and porcelain tiles.

From this

 

To this

In just 15 minutes.

With cleaning of rust as simple as apply on to surface, leave, then scrub and wash off.

Step 1:
First brush off any loose debris, dust and dirt from the surface of the stone, if necessary first wash with area with LTP Powerstripper leave to dry.

Step 2:
Shake well before use. Apply LTP Rust stain remover direct to the rust stain by paint brush or cloth.

Step 3:
Leave on the surface for 15 minutes to act on the rust.
LTP Rust stain remover will change to a purple colour as it reacts with the rust.

Step 4:
Once the indicated time has elapsed, agitate with a white emulsifying pad and rinse the surface with clean water. If necessary repeat the process.

For more information please visit our website here.

 

 

Please note that this information is offered as general guidance only and without guarantee.  Your specific circumstances may need an alternative approach.  In case of doubt, any process should be tried out in an inconspicuous area before general application.

How to seal hand made Terracotta.

The following is a cleaning and sealing guide for terracotta floor tiles. The products and methods specified should ensure that the surfaces are suitably conditioned before sealing. Future cleaning and aftercare then made easier following the application of an impregnating sealer and finishing the surface with either the traditional method or the synthetic method.

Teatree Handmade 20x20-left unsealed, right sealed with LTP Boiled linseed oil & Antique wax

Teatree Handmade 20×20-left unsealed, right sealed with LTP Boiled linseed oil & Antique wax.

Honey Terracotta 3

Honey  Handmade 30×20 Terracotta Sealed with LTP Boiled Linseed Oil, LTP Clear wax & LTP Antique wax.

20x30 unsealed honey

Traditional method.

The process of laying terracotta begins with spreading out your adhesive on your primed concrete or timber floor using a notched trowel, make sure to spread out the adhesive evenly and at the same thickness. Always work in manageable areas.

Then lay the terracotta into the adhesive, be careful not to get any adhesive on the top surface of the terracotta. Allow for a 5-10mm grout joint.
Leave the adhesive to set as per the manufactures instructions.

Once the adhesive has set, apply an even coat of LTP Boiled Linseed Oil and allow sealer to absorb naturally. Apply further coats at 2 – 4 hours intervals until the terracotta is fully saturated. (remove any excess that is on the tile after 1 hour).
Allow 24 hours for the final coat to cure.

Once the final coat has hardened apply a coat of LTP Antique Wax, leave for 20-30 minutes and the buff to a shine with a stiff brush or buffing machine.

After the wax has been buffed, grout tiles with a grout float, leave for the recommended time and sponge off the residues.
Once dry, dust of any remaining residues and then apply another coat of LTP Antique wax and leave to dry overnight.

For additional protection and to give the terracotta a shine, apply 2-3 coats of LTP Ironwax Gloss.

For more information on traditional sealing please follow our video guide.

For PDF Terracotta, Cleaning sealer & aftercare guide

For PDF Terracotta, Cleaning sealer & aftercare guide – easy aftercare option

The synthetic method.
Applying LTP Colour Intensifier

LTP Colour Intensifier is a colour enhancing matt finish sealer that still allows the tile to breathe. Lay the tiles in the adhesive the same as per the traditional method.

Once the adhesive has set, apply sealer to the surface of the terracotta and spread out evenly using a sealant applicator.
Allow the sealer to dry naturally and add another coat at two hourly intervals until the terracotta is fully saturated.

45 minutes after applying the final coat of sealer dry buff the surface using a microfiber cloth to remove any excess and leave to dry naturally. N.B newly sealed surfaces should be left to dry for a minimum of 12 hours before allowing heavy traffic or finishing with a film forming sealer.

Applying LTP Ironwax Satin or Gloss.

Apply sealer to the surface and spread out evenly, two coats should be applied at hourly intervals. Leave to dry naturally, do not rub or buff. Leave Ironwax to cure for 4 hours and then grout in the joints.

Once residual grout has been removed and the joints have been firmed off (min 12hours). Apply further thin coat and leave to dry. Repeat this until desired finish has been achieved (max 6 coats).

Newly sealed surfaces should be left to dry for a minimum of 12 hours before allowing heavy traffic. Do not wash for 3 days.

For PDF Terracotta, Cleaning sealer & aftercare guide – synthetic method

For weekly aftercare use LTP Floorshine.

 

 

Please note that this information is offered as general guidance only and without guarantee. Your specific circumstances may need an alternative approach. In case of doubt, any process should be tried out in an inconspicuous area before general application.

Sealing Stone Outside

Limestone, Sandstone, Travertine, Marble, Slate, Granite, concrete:
Regardless of what type of flooring you choose, the likelihood is it will require some form of sealing.

This is because natural stone is porous, and therefore if left unsealed, any moisture will be soaked up by the stone making it very difficult to remove, and potentially leaving the surface permanently stained (sometimes even fallen leaves can cause stains).

The best way to prevent all this is to seal the stone.

When you seal a stone, you are essentially filling any voids or pores of the stone with the sealer. This prevents any further liquid to absorb in to the tile, as demonstrated here with this close up shot of a water droplet on a tile sealed with LTP Mattstone.

When sealing natural stone outside it is important to use a breathable impregnating sealer, this will allow the transition of moisture from underneath.
Examples include LTP Mattstone H20 which will leave the stone looking as it does naturally. And LTP External Stone Sealer which will enhance any natural colour in the stone, both of these are water based breathable sealers and will require 24 hours to cure.

It is important to note that all stones located outdoors are susceptible to a condition known as efflorescence.
This blooming is caused by water moving through the substrate of a material and carrying minerals and salts found in the mortar bed, grout, soil or the stone itself.
We have a blog here all about efflorescence.

Its also very important when laying Natural stone to make sure that its fixed on a full bed of adhesive and not spot fixed.
The end result could look like this if its spot fixed.
Spot fixing issue Sandstone

If this has already happened to your patio, we have a blog here.

When sealing different natural stones, what will vary the most will be how many coats the stone will need before it is fully sealed.
Each stone exhibits different levels of porosity. A tumbled Limestone may have a higher porosity level than a Honed and filled Limestone.

Sealing natural stone with Mattstone H20 

Shake bottle before use.

Test the porosity of your stone with water and a teaspoon, using the LTP porosity test.

Once surfaces are clean and dry, apply the product to the surface evenly using a sealant applicator pad, brush or soft cloth.

When sealing its important not to over apply the sealer and redistribute excess, avoid letting the sealer pool on the surface, as this can cause white marks to appear on the stone when it dries.
On highly absorbent surfaces apply several coats wet-in-wet.
After 15 minutes, remove any excess sealer with an absorbent cloth. Do not allow residues to dry on the surface.
Do not walk on the surface for 3 hours and protect from wet conditions for 3 days.

Sealing Stone With LTP External Stone Sealer.

Shake bottle well before use. Apply evenly to the surface using a foam roller or paint brush. On more absorbent surfaces apply further coats at hourly intervals until the surface is completely saturated. Remove any residual sealer if still visible after one hour

Cleaning Tiles Outside

Before you start sealing your stone it is important to make sure your stone is clean and dry, other wise you will just seal in dirt and grime.

Old layers of sealer, dirt residues and light deposits of organic matter and algae must be removed from the surface and pores of the stone.

This can be done by either using LTP Grimex which is a intensive cleaner or LTP Mouldex Paving Cleaner.

To Clean with LTP Grimex, dilute 1:3 with water, apply to the surface with a sponge or water brush and leave to sit on the surface of the tiles for as long as it takes for the dirt to release. (5-30 minutes depending upon the level of dirt). If areas look as if they are drying out just add a little more solution to keep the area wet.

Agitate the surface with a stiff deck brush after approx 10 minutes (scrubber machines can be used).

Continue to scrub while adding clean water. Remove residues from the surface with water or scrubber machine.

Rinse thoroughly with clean fresh water to remove all remaining residues. Use a power washer if necessary.

Allow the surface at least 24 hours to dry before sealing.

To clean with LTP Mouldex Paving Cleaner, Shake well before use.
Surfaces to be treated should be completely dry before application.
Pour solution undiluted directly onto the pavers and spread out evenly using a sponge or paint brush, Garden sprayers can also be used and leave for a minimum of 1 hour.

Apply a little water and agitate with a stiff Deck brush or emulsifying pad to release the dirt and grime, and then rinse thoroughly using a hose or jet wash.
Some stubborn stains and black spot may require a longer treatment, in which case apply and leave on surfaces overnight. If some black spot remains after treatment, It should fade and disappear after a few days following the treatment. If not: re-apply. Keep pets off at all times during treatment. In case of contact with metals, fabrics and painted surfaces rinse with water immediately. Do not use on warm surfaces. Do not apply if rain is imminent. Avoid contact with ponds & plant life: if contact is made rinse well with plenty of water.

General Maintenance.
Weekly or daily depending on conditions, use a hose and a brush to remove any debris that may be lying on the stone.
Then annually if required use LTP Grimex, this will remove surface dirt and grime, possibly every 6-12 months depending on condition.
Dilute Grimex 1:3 parts water and apply the solution on to the surface and agitate.
Leave for 10 minutes before agitating again and then rinse with water.
Allow 24 hours to dry and then if necessary re-apply a light coat of sealer.

PLEASE NOTE: Always follow the detailed instructions on the product labels. Protect stone surfaces from contact with acidic substances. Do not use abrasive materials on honed or polished stones. Avoid using normal detergents or strong bleach cleaners on sealed surfaces as they will gradually remove the protective seal.

Please note that this information is offered as general guidance only and without guarantee. Your specific circumstances may need an alternative approach. In case of doubt, any process should be tried out in an inconspicuous area before general application.

Preparing Surfaces Before Sealing

All to often we see stone surfaces on busy sites that have been sealed, but not properly prepared before the sealing.

Resulting in sealed in boot prints, milling dust from cutting and grinding, and general dirt and grime.

Initial conditioning and cleaning before sealing is an important part of the protection process and ensures that the open pores of the stone are free from contaminants before filling with sealer.

The simple first step is quite commonly missed out and the consequences of this can lead to inadequate sealing resulting in staining and aftercare issues quite soon after installation.

To avoid these issues use LTP Grimex intensive cleaner.

Dilute 1:10 with water.  Wash down surfaces, rinse with water and then leave overnight to dry before sealing.

The result of this simple first step is deeper penetration of sealer, which will provide longer lasting protection………and of course…….no boot prints!

For more information about LTP visit our website.

LTP Grimex

Please note that this information is offered as general guidance only and without guarantee.  Your specific circumstances may need an alternative approach.  In case of doubt, any process should be tried out in an inconspicuous area before general application.

Problem Solving Black Limestone

We are often contacted in particular about black limestone, the appearance of stains and mineral deposits is not uncommon and occurs with most types of limestone, however the appearance on black limestone or darker stone is more prevalent. This is why it is possible to notice some marks appearing even before sealing. As a naturally occurring chemical reaction it is often difficult to avoid. So this blog is all about some of the different things that can happen, what you can do to prevent it or what you can do to resolve the issues as best you can.

Mineral Stains

Mineral deposit stains on black limstone

Mineral stains are sometimes caused when rain water trickles through sand-cement mortar screeds, toppings and bedding under limestone paving can become moderately alkaline. As this rainwater evaporates, its alkalinity increases until the solution becomes saturated.
This solution then can travel to the surface within the limestone where it starts to deposit solids such as white and grey encrustations of calcium carbonate also known as lime plumes.
To remove the the mineral salts from the surface wash the surface with a mild solution of acid*. This will help disperse the mineral salt deposits from the surface.
LTP Grout Stain Remover is a product suitable for the task, dilute 1 part LTP Grout Stain remover in 4 parts warm water and apply to the surface of the stone. Agitate using an emulsifying pad or similar abrasive pad and then rinse thoroughly with plenty of clean water. Repeat process if necessary.
For more information about LTP Grout Stain Remover please see the Technical Data Sheet.

*N.B Grout stain remover may etch the surface and cause the stone to dry lighter.
If the Limestone is either Honed or Polished do not use LTP Grout Stain Remover and instead use LTP Powerstripper.

Mineral deposits causing a banding effect

Halo Stains & Bands Of Mineral Deposits.

This is caused by trace amounts of sodium and potassium oxides within the Limestone which can also be activated by rain water. Even where rain is slightly acidic, the solutions of these salts in rainwater will gradually become alkaline. Surface wetting and evaporation can produce recurrent patches and bands of dampness known as accumulation zones ( rainwater pooling on the surface where it cannot run off).

Evaporation concentrates the alkaline solutions until they become saturated at the  outer limits or edge of accumulation zones. Further evaporation then causes precipitation, crystallisation and immobilisation of the salt at the surface and in pores immediately below the surface. The resulting bands of distinct pigmentation are halo stains as seen in the image above of Limestone.

Grout & Adhesive Stains.

img_0122

Adhesive Stains On Limestone

Grout and adhesive stains like this appear often, if the stone has been sealed beforehand then the process of removing the residues is easier.
After grouting most of the residues should be taken off with water before it fully dries on the surface. For the removal of most grout residues on Limestone we would recommend using LTP Powerstripper. However on more severe cases as shown in the picture above, using a mild solution of LTP Grout Stain Remover may be more effective.
Grout Stain Remover is an acid based cleaner and will etch any acid sensitive surfaces (Limestone, marble, some sandstones, chrome etc).
We would always recommend to test on a small inconspicuous area first.
LTP Grout Stain Remover Tech Data Sheet.

General Dirt & Grime

If your limestone has been outside for a couple of years, it may have seen better days.
General dirt and grime can be easily removed with LTP Grimex.
Dilute in a bucket of water as per instructions on the back of the bottle, then apply and leave for 10 minutes. Give it a scrub with a deck brush or an emulsifying pad and then rinse with plenty of clean water.
After cleaning allow to dry for 24 hours and then the stone will be ready for resealing.

Protect your Limestone with the correct sealing product.

Sealers used to enhance the appearance and help prevent limestone pavers staining from organic matter outside need to be breathable. LTP Mattstone H20 & LTP Stone Oil are examples of breathable sealers suitable for external use. As well as protecting the stone from staining, breathable sealers will allow the microscopic transition of moisture assisting any trapped moisture to escape through the stone from the mortar and sub surfaces. However, moisture permeating through the stone and sealer to the surface can still dry to leave a calciferous deposit.

Once the stone is thoroughly dry and mineral salt deposits are greatly reduced, general dirt and grime has been cleaned off, reseal the stone with an appropriate limestone sealer. LTP Mattstone H20 is highly effective natural stone sealing solution and is suitable for exterior use. However many of our customers have used LTP Stone Oil after acid washing their stone as it helps to re-enhance and deepen the colour.

Apply LTP Stone Oil to the surface of the stone using a paint brush. Allow it to absorb into the stone and then remove any visible excess from the surface after 45 minutes using an absorbent dry towel. The aim is to completely saturate the stone with as many coats of the sealer as necessary, but do not allow the sealer to dry and leave a film on the surface. Do not apply in direct sunlight.
For more information on how to apply please see the Technical Data Sheet.

LTP Mattstone H20 is applied to the surface with a paint brush, allow to absorb for 15 minutes and then apply a second coat. Remove any visible excess on the surface after 45 minutes.
For more information on how to apply please see the Technical Data Sheet.

 

Please note that this information is offered as general guidance only and without guarantee. Your specific circumstances may need an alternative approach. In case of doubt, any process should be tried out in an inconspicous area before general application. 

Removing Stubborn Cement & Grout Residues From Porcelain & Ceramic Wall & Floor Tiles

The following is an intensive cleaning guide for removing cement and grout residues from the surface of porcelain and ceramic wall & floor tiles following installation.

Porcelain-Tile-Header-Image

 

FOR USE ON ALL TYPES OF PORCELAIN & CERAMIC WALL & FLOOR TILES

 

1ltr-+-5-Ltr-Grout-stain-reLTP GROUT STAIN REMOVER

A rapid action cleaning agent for removing cement residues, grout stain, efflorescence and other similar deposits.  This product can be used in diluted or concentrated form, to assist removal of stubborn residue.

TECHNICAL FEATURES

  • High performance  .
  • Targets heavy or light films.
  • Walls & floors.
  • Rapid action.
  • Easy to use.
  • Interior & Exterior.
  • Efflorescence remover
DIRECTIONS FOR USE: FLOORS- REMOVING CEMENT AND GROUT RESIDUES MANUAL APPLICATION

GSR-Directions-Manual-Application

Step 1.Dilute solution 1-1 with water.

Step 2. Apply to the surface and leave for 5 minutes.

Step 3. Scrub surfaces and grout joints to release the grout residue.

Step 4. Sponge up or extract released residues and rinse with water.

Step 5. Allow surfaces to dry before allowing traffic.

DIRECTIONS FOR USE:FLOORS-REMOVING CEMENT AND GROUT RESIDUES MACHINE APPLICATION

GSR-Directions-Machine-Application

Step 1.Dilute solution 1-1 with water.

Step 2. Apply to the surface and leave for 5 minutes.

Step 3. Scrub surfaces and grout joints to release the grout residue.

Step 4. Sponge up or extract released residues and rinse with water.

Step 5. Allow surfaces to dry before allowing traffic.

REMOVING EFFLORESCENCE,WATER AND RUST STAINS FROM THE SURFACE OF STEPS AND RISERS.

Removing efflorescence,water,rust from steps and risers

Step 1.Decant solution into spray bottle and label clearly. Surfaces should be as dry as possible before application.

Step 2. Spray the solution onto the surface making sure to work in manageable areas at a time.

Step 3. Agitate immediately using a short haired stiff bristled brush. Repeat application until residues are removed.

Step 4. Rinse well with plenty of cool water. This should be done at least twice.

Step 5. Allow surfaces to dry naturally.

DIRECTION FOR USE- REMOVING CEMENT RESIDUES FROM WALLS……

Removing cement residue from walls

Step 1. Dilute solution 1 :1 in water.

Step 2. Apply to the surface of the tiles using a microfibre cloth.

Step 3. Scrub immediately using a black emulsifying pad.

Step 4. Rinse with water several times.  Change rinsing water frequently.

Step 5. Allow surfaces to dry naturally.  On higher glazes buff with a dry cloth to finish.

 

FURTHER INFORMATION – CLEANING:
After applying the cleaning solution work in teams of two. One operator should agitate the surface using mildly abraisive pad or rotary machine.The other operator should use a sponge and water or wet vac for immediate rinsing & extraction. This will prevent released dirty residues reabsorbing into the surface and greatly reduce the drying time of surfaces. If a scrubbing machine is used, use cool water only within the tank on the machine. Do not put intensive cleaning solution through the machine as this will impair it’s effectiveness.
If applying to walls, steps or risers start on the top and work down. Try to work in manageable areas at a time and make sure to rinse well with plenty of water after each application. Rinsing should be repeated at least 2 times after cleaning. In areas where the staining is deep repeat the process until all of the stains have gone.

USEFUL EQUIPMENT: 4pc pole, pad holder, black emulsifying pad or rotary scrubbing machine with onboard water tank, stiff brush attachment for the machine, wet vac, buckets, sponges, absorbant towels (for spillage control), Plastic film and masking tape for covering and protecting any surfaces not to be cleaned. Avoid prolonged contact with metal surfaces. Rinse immediately. Ensure that any sensitive surfaces not to be cleaned are properly covered and protected before beginning. Ensure that gloves and eye protection and suitable clothing are worn at all times.

 

This information is offered without guarantee. The material should be used so as to take account of the local conditions and the surfaces to be treated. In case of doubt, the product should be tried out in an inconspicuous area

Sealing Stone Outside.

Limestone, Sandstone, Travertine, Marble, Slate, Granite, concrete:
Regardless of what type of flooring you choose, the likelihood is it will require some form of sealing.

This is because natural stone is porous, and therefore if left unsealed, any moisture will be soaked up by the stone making it very difficult to remove, and potentially leaving the surface permanently stained (sometimes even fallen leaves can cause stains).

The best way to prevent all this is to seal the stone.

When you seal a stone, you are essentially filling any voids or pores of the stone with the sealer. This prevents any further liquid to absorb in to the tile, as demonstrated here with this close up shot of a water droplet on a tile sealed with LTP Mattstone.

When sealing natural stone outside it is important to use a breathable impregnating sealer, this will allow the transition of moisture from underneath.
Examples include LTP Mattstone H20 & LTP External Stone Sealer both are water based breathable sealers and ideal for use outside.

It is important to note that all stones located outdoors are susceptible to a condition known as efflorescence.
This blooming is caused by water moving through the substrate of a material and carrying minerals and salts found in the mortar bed, grout, soil or the stone itself.
We have a blog here all about efflorescence.

Its also very important when laying Natural stone to make sure that its fixed on a full bed of adhesive and not spot fixed.
The end result could look like this if its spot fixed.
Spot fixing issue Sandstone

If this has already happened to your patio, we have a blog here.

When sealing different natural stones, what will vary the most will be how many coats the stone will need before it is fully sealed.
Each stone exhibits different levels of porosity. A tumbled Limestone may have a higher porosity level than a Honed and filled Limestone.

Sealing natural stone with Mattstone H20

Shake bottle before use.

Test the porosity of your stone with water and a teaspoon, using the LTP porosity test.

Once surfaces are clean and dry, apply the product to the surface evenly using a sealant applicator pad, brush or soft cloth.

When sealing its important not to over apply the sealer and redistribute excess, avoid letting the sealer pool on the surface, as this can cause white marks to appear on the stone when it dries.
On highly absorbent surfaces apply several coats wet-in-wet.
After 15 minutes, remove any excess sealer with an absorbent cloth. Do not allow residues to dry on the surface.
Do not walk on the surface for 3 hours.

Sealing natural stone with External stone sealer.
Apply evenly to the surface using a foam roller or paint brush. On more absorbent surfaces apply further coats at hourly intervals until the surface is completely saturated. Remove any residual sealer if still visible after one hour.

Cleaning Tiles Outside

Before you start sealing your stone it is important to make sure your stone is clean and dry, other wise you will just seal in dirt and grime.

Old layers of sealer, dirt residues and light deposits of organic matter and algae must be removed from the surface and pores of the stone.

This can be done by either using LTP Grimex which is a intensive cleaner or LTP Mouldex Paving Cleaner.

To Clean with LTP Grimex, dilute 1:3 with water, apply to the surface with a sponge or water brush and leave to sit on the surface of the tiles for as long as it takes for the dirt to release. (5-30 minutes depending upon the level of dirt). If areas look as if they are drying out just add a little more solution to keep the area wet.

Agitate the surface with a stiff deck brush after approx 10 minutes (scrubber machines can be used).

Continue to scrub while adding clean water. Remove residues from the surface with water or scrubber machine.

Rinse thoroughly with clean fresh water to remove all remaining residues. Use a power washer if necessary.

Allow the surface at least 24 hours to dry before sealing.

To clean with LTP Mouldex Paving Cleaner, Shake well before use.
Surfaces to be treated should be completely dry before application.
Pour solution undiluted directly onto the pavers and spread out evenly using a sponge or paint brush, Garden sprayers can also be used and leave for a minimum of 1 hour.

Apply a little water and agitate with a stiff Deck brush or emulsifying pad to release the dirt and grime, and then rinse thoroughly using a hose or jet wash.
Some stubborn stains and black spot may require a longer treatment, in which case apply and leave on surfaces overnight. If some black spot remains after treatment, It should fade and disappear after a few days following the treatment. If not: re-apply. Keep pets off at all times during treatment. In case of contact with metals, fabrics and painted surfaces rinse with water immediately. Do not use on warm surfaces. Do not apply if rain is imminent. Avoid contact with ponds & plant life: if contact is made rinse well with plenty of water.

General Maintenance.
Weekly or daily depending on conditions, use a hose and a brush to remove any debris that may be lying on the stone.
Then annually if required use LTP Grimex, this will remove surface dirt and grime, possibly every 6-12 months depending on condition.
Dilute Grimex 1:3 parts water and apply the solution on to the surface and agitate.
Leave for 10 minutes before agitating again and then rinse with water.
Allow 24 hours to dry and then if necessary re-apply a light coat of sealer.

PLEASE NOTE: Always follow the detailed instructions on the product labels. Protect stone surfaces from contact with acidic substances. Do not use abrasive materials on honed or polished stones. Avoid using normal detergents or strong bleach cleaners on sealed surfaces as they will gradually remove the protective seal.

Please note that this information is offered as general guidance only and without guarantee. Your specific circumstances may need an alternative approach. In case of doubt, any process should be tried out in an inconspicuous area before general application.