Carlisle's Sure-Flex KEE HP Reinforced Cover strip is an 8" (20.3 cm)-wide, PVC flashing that contains a polyester reinforcing fabric. KEE HP Reinforced Cover strip is used for stripping in rows of fasteners and plates, as well as covering the butt joints of Sure-Flex, Sure-Flex KEE HP, FleeceBACK® PVC and FleeceBACK KEE HP PVC membranes. This product's smooth surface allows a total surface fusion weld over a wide temperature range, facilitating a consistent, watertight roof system.