HG Natural Stone Impregnating Protector 1L Penetrates deep into the surface & completely seals off small pores. Larger pores are made smaller meaning liquid molecules can no longer be absorbed preventing the formation of stains & dirt. Allows the stone to breathe Does not noticeably change the original characteristics of the material Leaves a matt finish enhances natural colours, does not contain silicone Suitable for inside & outside use. Used to impregnate porous marble, travertine, terrazzo, granito, slate, sandstone, limestone & other natural stone floors & walls to protect against stains & stubborn marks. Extremely suitable for concrete tiles with pieces of natural stone incorporated such as marble composites. Coverage: Highly porous natural stone: 10-20 m per litre. Slightly porous & high gloss natural stone 20-50 m per litre.