Marble Sealer Rain Stop 1 lt and 5 litres Is a waterproofing, antismog antimould protection agent. it penetrates through the surface getting waterproof the material. It doesn't make film nor changes the colours. It doesn't interfere with the natural transpiration of the materials. It gets a barrier against the cossosive action of the atmosferic agents, it gives prominance to the batural shades and get less slipery the polishied surfaces.