PRICES SHOWN ARE ONLINE PRICES ONLY, PRICES INSTORE FOR TRADE CUSTOMERS WILL BE DISCOUNTED ROCATEX Anti-Fracture Mat is an uncoupling membrane designed to accommodate lateral movement for tile installations on floors with limited movement. When used as a system with ROCATEX S1/S2 flexible adhesives, it forms an easy to use, highly flexible, crack prevention system which combines the functions of uncoupling and stress/crack bridging caused by shrinkage.