Stays on for up to one year without deterioration even outdoors. Saves time of removing sticky residue. Strong waterproof backing resists wear, abrasion, moisture, and weathering. Aggressive adhesive for quick and reliable attachment. Data Sheet 3 x 60 yds. Slate Blue 3M - 8979 Duct Tape. Removes cleanly for up to six months from most opaque surfaces even after exposure to sunlight and temperature extremes. Stays on for up to one year without deterioration even outdoors. Saves time of removing sticky residue. Strong waterproof backing resists wear, abrasion, moisture, and weathering. Aggressive adhesive for quick and reliable attachment. 12.6 Mil. Case of 12.