If one finds a split in one of the standard modern plastic water butts, ubiquitous at B&Q and every garden centre, what is the best way to repair it? I suspect the plastic is polypropelene, but I may be wrong. I wondered about using a hot soldering iron to melt the plastc together, over the crack, or woild it be better to use that black mastic gutter sealant stuff sold in tubes for mastic-gun application? What do you think? Which would make the strongest most durable repair?
TIA,
Al