"This has multi uses apart from insulating pipes very well as previous reviewers mentioned. I'm using these for a hobby to support items between two vertical pipes to cushion and prevent chaffing the 22mm pvc pipes.
"Used these to insulate some central heating pipes in a cupboard / under floors. Really easy to cut (used a serrated kitchen knife) and fit over pipes no bother. Was impressed with how cool the outside of the insulation was when the pipes were hot so obviously works pretty well!"
"Pity about the printed labelling on the outside, but leaving that aside and the fact of only grey colour being available, this stuff is excellent value in places where there isn't space for the thicker insulation. In my case that was a side porch where I've insulated the runs from the boiler inside to the hot water tank."
"Have been using this for years without any probs, but if used outside you need to cover it with aluminium tape, otherwise the sun will cause it to crumble to dust. (And beware rodents that like to nibble it for nesting material!)"