How To Remove Orange/Pink Stains From The Edges Of Natural Limestone

Tanin and mould stains on Limestone copy

 

DEEP CLEAN UN-SEALED SURFACES TO REMOVE STAINS BEFORE SEALING

 

Limestone tiles are saturated with moisture during fabrication and packed into wooden crates for transport.  They are tightly packed so any retained moisture within the stone can remain for many weeks after packing. Moisture in the stone absorbs into the timber of the crate, which after a while causes tannins from the timber to become drawn into the edge of the stone, where it dries to leave an orange pink deposit. Retained moisture can also encourage the growth of mould spores which also contribute towards the staining affect.

PICTURE 1: SHOWS ORANGE STAINING FROM ALONG THE EDGE OF A PIECE OF WHITE LIMESTONE

Before copy

PICTURE 2: SHOWS APPLICATION OF MOULDEX TO THE EDGE AND SURFACE OF THE STONE

Mouldex application copy

PICTURE 3: SHOWS THE RESULT, PINK & MOULD STAINS HAVE BEEN REMOVED & THE STONE IS CLEAN

After copyBefore, during & After close up copy

STAIN REMOVAL:                         LTP MOULDEX                                                 500ML

Spray Mouldex to the edges and surface of the stone and spread out evenly making sure to cover the whole stone and not just the areas affected by staining. Leave on the surface for 2 – 3 hours. Agitate using a soft (white) emulsifying pad until the solution foams up and rinse well using plenty of water and a sponge. Change rinsing water after every 5 M². Surfaces should be left for a minimum of 24 hrs before sealing.

TDS – http://www.ltp-online.co.uk/images/tds-Mouldex.pdf

 

SEALING:                                        LTP MATTSTONE                                500ML,1&5ltr

Apply LTP Mattstone Sealer evenly to the surface of the stone using a sealant applicator pad. The impregnating sealer should be left for 45 minutes to absorb. Buff well using a soft cloth or machine with white pad to work off any visible excess.  Apply further coats at two hourly intervals using the same method. The object is to fully saturate the marble and terrazzo with sealer without allowing any excess to dry on the surface. The marble will be more absorbent than the terrazzo. Leave for a minimum of 24 hours before allowing traffic.  Treated surfaces will take about 3 days to become fully resistant. So light traffic only and do not wash.

TDS – http://www.ltp-online.co.uk/images/tds-Mattstone.pdf

IMPORTANT NOTES:
For really stubborn stains the stain removal process may need to be repeated.
Provided the surfaces are correctly sealed and maintained protection should last 4 – 5 years before considering applying a top up coat. Sealing will not prevent wear from abrasion. Stone surfaces laid in heavily trafficked areas should be tested for moisture ingress every 12 – 18 months. If moisture absorbs apply more sealer.
After Intensive cleaning to remove any ingrained dirt or other staining and once dry, always test for moisture ingress. If evident cleaned areas should be re-sealed. Maintain sealed surfaces with PH Neutral cleaner LTP Waxwash.
For detailed application instructions please see Technical Data Sheets.
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
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