Self-Adhesive Peel & Stick Membrane: Equipped with innovative tech, the new YeloDeer self-adhesive heating cable underlayment membrane adheres to the subfloor using PSA, eliminating the need for traditional thin-set mortar application Long-Term Bonding With Floor Membrane: Multipurpose uncoupling membrane mat's peel-and-stick membrane bonds well to insulation boards post-cleaning. Its self-healing adhesive stays are sticky, flex with floor movement, and then harden once settled, ensuring lasting floor protection Quick Installation: No mixing and spreading mortar underneath, Peel off the adhesive liner and set the uncoupling membrane roll in place. Easily repositioned during installation until pressure is exerted on the top Protects Your Tiles: YeloDeer flooring underlayment is Engineered with durable PE & PP compound boasting high electrical insulation properties, and thickness: 0.22" / 5.5 mm. The uncoupling flooring mat features a 100% waterproof polyethylene construction which safeguards against water ingress, and dampness. This floor heating cable membrane reduces tile breakage and eliminates ground problems Works with Any Room Size: The tile underlayment membrane's size can be customizable to perfectly match your area, enabling a steadfast installation, and suitable for any diameter range of 3.8-5.0 mm electric floor heating cables membrane