An ultra-premium polymer-modified mortar for interior & exterior installations, capable of setting all sorts of coverings; porcelain, saltillo, ceramic, glass, granite, slate, marble, limestone, thin porcelain tiles, large porcelain panels, and dimensional stone tiles. A product with excellent mixing and application properties—use over properly prepared concrete, structurally-sound, exterior grade plywood ( interior / dry use only ), cementitious backer board; Bostik Ultra-Set Advanced, Bostik Black-Top, Bostik GoldPlus; existing, well-bonded vinyl / VCT or ceramic tile and cutback adhesives residue ( dry only ).