Tamlyn® XtremeCornersTM are prefabricated, seamless corners intended to facilitate proper flashing of window and door sills. Sill corners are the most vulnerable areas of window and door systems and often the most difficult to properly detail and maintain water tight. XtremeCornersTM create a water tight, seamless corner that is easily integrated with standard self-adhered flashing. XtremeCornersTM are a key component of the Tamlyn® flashing and water management systems. Window and door leaks are a major concern for builders, contractors and owners alike. To prevent water from entering the building, these critical areas must be flashed and properly integrated with your water management system. XtremeCornersTM provide a cost effective option that facilitate easier detailing of sills versus multiple flashing pieces or premium sill pan systems.