TRI-BUILT® CuttingEdge Gutter Sealant is a commercial grade Adhesive/Sealant designed to seal all types of rain carrying systems. This “terpolymer” formula will penetrate and seal all joints associated with gutters. It is ideal for new installations and repairs over failures of previous sealants. This compound cures to a tough rubbery film that remains flexible in sub-zero temperatures. Full UV protection.