Lithofin MN Stain Stop is a special sealing product for use on marble, natural and engineered stone. Lithofin MN Stain Stop penetrates the surfaces treated creating a thin invisible non absorbent coat that makes oil, grease and water to remain on the surface (12 to 36 hours on polished marble and limestone, up to 48 hours on granite and gneiss). During this time, oil can easily be removed without leaving stains. Lithofin MN Stain Stop does not affect the appearance of natural stone. Some stones may become slightly darker in colour. Lithofin MN Stain Stop greatly reduces the water absorbency of natural stone and only slightly effects the water permeability. Lithofin Stain Stop is for invisible protection against staining and for facilitating maintenance of all natural stone surfaces, including polished marble. It is UV-resistant and does not yellow.