The "KERALASTIC" Premium Mortar System is ideal for difficult-to-bond natural stone, large porcelain and glass-bodied tiles. A unique polymer additive designed to be used with "KERABOND" dry-set mortar for increased bond strength, improved vibration and impact resistance and to provide freeze/thaw resistance. For interior and exterior installation. Meets ANSI A118.4 when mixed with "KERABOND". 7.56 L.