Unlike many traditional putty tapes, our advanced water resistant aluminum layer tape can avoid water from infiltrating into the work base. No need to do extra waterproof layer, save your time and money. Butyl repair tape has a wide operating temperature range, it can be used at -40*C/-40*C without cracking and deformation. Clean the base surface, make sure the surface clean and dry before application, align the desired base gap width and select the appropriate size and peel off the released film. Our aluminum foil tape is made of premium pressure sensitive adhesive. Consistent adhesion is provided at low and high temperatures, UV resistant, moisture resistant, heat resistant and shows good performance in any type of weather. This butyl waterproof tape is suitable for leak proof, window sealing, RV awnings, gutters, down spots, boats, personal watercrafts, canoes, outdoor equipment, mobile homes, RV?s and campers, PVC and plumbing pipe, sprinkler systems, doors, walls, seams, HVAC systems, etc. Read Less