Flex Shot is a super thick rubber sealant that caulks, bonds, seals virtually everything. Flex Shot forms a watertight, flexible barrier and is so easy to use. No need for a bulky caulking gun, just push the nozzle for a perfect bead every time.No running or dripping and never shrinks or cracks. Available in mildew-resistant white or clear. Available in 8 oz. size. Includes free extension tube.