Ritver Gypsum Putty is a specially designed water-based composite base on an acrylic copolymer and suitable pigments, filler with good alkali resistance. It is primarily used for use on gypsum boards, spray plasters, and other cementations compositions, to give an even surface for subsequent painting after filling surface irregularities, construction flaws, hairline surface cracks & indentations. It has got sufficient plasticizing properties to make it suitable for a reasonably thick application that will not peel off or flake after drying. USE Substrates: Gypsum, Gypsum boards, Spray plasters, and certain wood applications. Area of Use: Interiors only