A versatile mat underlayment for setting tile and stone over any acceptable subfloor.EasyMat®is so fast and easy to install because it is up to 25 times lighter than 1/4 in (6 mm) backerboard, cuts easily with a utility knife, and doesn't require any nails or screws. The mat was specially designed so that the mortar locks in, creating a bonded crack-prevention system for subfloor movement up to 1/4 in (6 mm). This bonded system will withstand repeated stress and still maintain its tenacious bond. It is a superior alternative to cork underlayments because it will not rot, shrink,or absorb water. EasyMat® has SoundGard® Technology and therefore offers high and credible impact sound reduction. Use EasyMat® with other Custom® materials to qualify for a lifetime warranty.