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