More use is being made of natural stone materials for worktops and tiles such as marble, granite and limestone. These materials whilst being beautiful are porous and so prone to staining. Sovereign Stone Sealer is a top quality tile and worktop protector that penetrates into the surface to leave a completely invisible layer of protection from water and oil based materials. Sovereign Slate Sealer provides a clear finish that enhances the colour of slate and is water repellent and hard wearing.