Offers economy with good bond strength for most tile projects and is recommended for floor installations. Good for setting Saltillo and other similar clay pavers. Offers good working time to apply and adjust tiles. For increased performance use Custom Building Products Thin-Set Mortar Admix when bonding dense tiles (porcelain and glass) or setting over Exterior Grade Plywood (EGP) existing tile and for exterior applications. Meets ANSI A118.1 without additives. Meets ANSI A118.4 and A118.11 when mixed with Thin-Set Mortar Admix. Brand Name: Custom Building Products Color: Gray Product Type: Thin-Set Mortar Container Size: 50 lb Indoor or Outdoor: Indoor and Outdoor Additive Required: No Commercial or Residential: Commercial and Residential Suitable for Floors: Yes Suitable for Walls: Yes Maximum Coverage Area: 90 sq ft Dry Time: 24 hr