Dark stone types such as the darker granite varieties, belgian bluestone etc. are subject to wear & tear after a while, which can be seen as matt, dull, grey coloured walkways or patches. hg colour intensifier for granite, blue stone & other natural stone types is a professional product which re-enhances the colour of your freestone & brings it back to life. This unique composition also impregnates, nourishes & protects stone against dirt & staining by water or other liquids. it will not make the surface slippery nor harm the natural breathing process of the stone. clean the surface, preferably using hg super remover. any cement and/or mortar residue should be removed using hg cement grout film remover or hg cement, mortar & efflorescence remover. For marble, belgian bluestone & other calciferous stone varieties, use hg marble cement & lime film remover. leave the surface to dry for 3 days & then apply hg colour intensifier sparingly using a clean non-fluffy cloth. for larger surfaces, apply hg colour intensifier evenly using a mohair roller & then rub it in using a clean, non-fluffy cloth.after 5 to 10 minutes maximum, the colour enhancer will be absorbed into the stone. remove any surplus very carefully using a dry cloth (and possibly turpentine). on very porous surfaces, repeat the treatment until the surface no longer absorbs the product. when a glossy surface is required, 1it can be polished after 30-40 minutes. the stone is walkable again after 4 hours & can bear loads after 3 days.