Gloss Crystal Clear Sealer is an acrylic spray which provides a hard and clear GLOSS coating to almost any surface. Gloss Crystal Clear can be applied to wood, plaster, clay, metal, glass, and more. Suitable as an effective barrier for sealing porous surfaces prior to applying rubber mold making compounds to patterns. Dries in 12 minutes or less to a gloss finish. Part can be handled in one hour. Coverage : Up to 25 sq.ft. per can on a non-porous surface.