posted 5 years ago
They are not UV stable! At least none that I've seen. Too much sun and they flake and tear. They will last for years setting outside, say full of aluminum cans beside my shed, but they won't support a load. Full of something light like cans, I'd say 6 months outside will be ok. Anything heavy like grain or rock, maybe a month, but for me the limit is one day if I'm doing a big sack shuffle. I've resacked so many of those by hand after the straps broke. So you you are going to repurpose them for anything, make sure the sun can't get them.
Sack plastic might eventually biodegrade, but its probably one of those that takes 90 years.