[Multi purpose]: Waterproof floor underlayment can be extended to shower rooms, bathrooms, steam rooms, kitchens, laundry rooms, bathtub , enclosed balconies, as well as living and dining rooms. [High Density PE]: Three layer design, a modified polythylene core with non woven polythylene on both sides and a continuous filling fiber, that can last for many years. [Water & Vapor-proof]: Rich in steam retarders, compatible with tiles, ceramics, wall tiles, wooden boards, etc., helping to prevent damage caused by water accumulation and steam. [Easy to use]: Suitable thickness, can be freely cut and folded into perfect size shapes, fixed with unmodified thin mortar, saving corner accessories., Manufacturer: CTRLZS