This natural stone requires a base sealant that absorbs into the body of the stone to quell the porosity, followed by if required a liquid surface wax which provides a slight finish and forms an additional protective layer. Base sealants can be either solvent-based or water-based and the base sealant required differs depending on the density and finish of the material being sealed. Solvent-based and water-based sealant options should not be mixed.
Once the stone has been fixed, cleaned with Rocatex Cleaner, and is thoroughly dry, one coat should be applied with a brush or sponge before the stone is grouted. This initial application of base sealant helps to prevent grout residues adhering to the surface, and grout pigments absorbing into the stone.
After the grout has been applied and allowed to dry for a suitable length of time, the tiles should be given a further wash with dilute cleaner to remove any grout polymers which may prevent the base sealant from absorbing into the stone.
Once clean and dry a further 1-3 applications of base sealant should be applied as required, to further protect the stone. Any sealant residues must be cleaned off the tile surface immediately as they may leave surface streaking. More porous stones may take several more coats. The grout joints should also be sealed at this time.