Double-thick adhesive grips smooth; rough and uneven surfaces Tough reinforced backing contributes to the strength Rugged; weather-resistant shell withstands moisture; UV rays and temperature extremes >>Gorilla silver tape is 3x stronger for a hold that lasts. made with double-thick adhesive; strong-reinforced backing and a tough all-weather shell this duct tape is great for projects and repairs both indoors and out. Sticks to smooth; rough and uneven surfaces; including wood; stone; stucco; brick; metal and vinyl. Gorilla tape; for the toughest jobs on planet Earth.