Durabase CI++ Waterproof Uncoupling Mat Underlayment (54 sq. ft. 3 ft. 3 in. x 16 ft. x 1/8 in.) - Amazon.com
Quantum Group NI - DURABASE CI++ Multi-functional Matting System • Bridges cracks and alleviates stress • Functions as waterproofing in indoor applications • Highly resistant to mechanical loading • Faster laying, thanks