Not really a cheap fix but a free source of a certain supply.
If you see a flat roofed building getting a new rubber/gravel roof instaled, they often toss 5" wide rolls of mastic tape in the dumpster when they have less than 5 feet of tape left on the roll. A couple of rolls from the dumpster could be a lifetime supply butyl tape. I think its all the same stuff.
If you see a flat roofed building getting a new rubber/gravel roof instaled, they often toss 5" wide rolls of mastic tape in the dumpster when they have less than 5 feet of tape left on the roll. A couple of rolls from the dumpster could be a lifetime supply butyl tape. I think its all the same stuff.