T-REX Engineered for all-weather performance and featuring a ferociously strong adhesive, T-Rex waterproofing and repair tape is the tool you need on your next big construction project. The high-tack, permanent adhesive instantly sticks to a variety of building materials while the conformable backing stretches around the surface it's applied to. A great alternative to caulk for sealing seams and gaps in building materials, this waterproof repair tape is mess-free and can be cut-to-size for specific uses.