Mapei Mapelastic CI Crack Isolation Membrane

NA 1550 Crack-Isolation Membrane is a flexible, thin, lightweight, load-bearing, self-adhered membrane over which ceramic tile and natural stone can be installed immediately with any polymer-modified cement mortar or epoxy mortar. Glue-down wood flooring also can be installed with any urethane adhesive. NA 1550 is less than 1/16" (1,5 mm) thick, lightweight, easy to position on the floor and cut to size with a razor knife or scissors. NA 1550 also provides excellent sound reduction between floors, having an IIC (impact insulation class) rating of 47, a Delta IIC rating of 16, and an STC (sound transmission class) rating of 52, all without a suspended ceiling.