Custom Building Products - EasyMat 4' x 10' Underlayment for Crack Insulation Under Tile and Stone - 5 mm (40 sq ft)

A versatile, lightweight, easy-to-use, and easy-to-cut underlayment for installing tile and stone on any acceptable subfloor. The mat is designed so the mortar locks in place, creating a bonded crack prevention system for subfloor movement up to 1/4" (6 mm). Its SoundGard technology provides high, credible impact sound reduction.

• 25 times lighter than 1/4" (6 mm) backerboard
• 9 times lighter than other soundproofing mats
• Highest level of impact sound reduction (up to 71 dB)
• An excellent alternative to cork underlayment since it won't shrink, rot, or absorb water