BITEC'S newest product, DEFEND offers excellent ice and water protection for residential use under shingles. When used on roof perimeters, valleys and flashings, It will help protect your home from water intrusion caused by melting snow or ice dams. It is formulated using high quality SBR modified bitumen. The SBR compound is monolithic throughout the membrane and has superior elasticity to seal around nails and staples. DEFEND contains high-strength fiberglass reinforcement for excellent dimensional stability. It has a special adhesive surface for secure bonding to the roof deck. Special release film is loosely attached to this adhesive and is to be removed by the installer prior to application.