MAPEI UltraFlex 1 50 lb Gray Powder Thinset Mortar Granite Sink Durable Materials: Steel construction with The rustproof injection molded Durable Materials: Steel construction with brass faceplate and polished brass finish for lasting shine 75 Material Aluminum Color Family Black Stair Part Type Handrail Interior Exterior Exterior Features Prefinished For use with ceramic and most natural stone Ideal for small tiles with all sides 15 inches or less Mix with water no additive required Use on floors and walls Using this MAPEI product may help contribute to LEED certification of projects Use Over Exterior Grade Plywood No Use Over Concrete Yes Warranty 1 year limited Series Name UltraFlex 1 Unit of Measure Pound(s) Unit of Measure Quantity 50 Rapid Setting No Color Finish Family Gray Freeze Resistant Post Installation Yes For Use with Garage Walls Yes For Use with Shower Walls No Product Type Powder UNSPSC 30111500 For Use with Vinyl Floors No For Use with Garage Floors Yes For Use with Bathroom Walls Yes CA Residents: Prop 65 Warning(s) Yes Use Over Cement Backer Board Yes For Use with Kitchen Counters Yes Use Location Outdoor Type Thinset mortar For Use with Shower Floors No For Use with Kitchen Backsplashes Yes For Use with Bathroom Floors Yes Required Additional Components Water For Use with Pools No For Use with Patios Yes For Use with Fireplace Exteriors No