Okay -- this one then Duct Tape (my slang gave it away)
Well what I should say that had shocked me that a lady who was renting a house and use duct tape to replace a leak on the roof. Now I have seen people using this stuff of car body repair (fender) head and tail lights but never in the world for a house roof. The product can't even stand up against the sun of SFL before it breaks down.