Let me be very specific so my post doesn't get removed again.
I'm currently insulating my pipes with loose rockwool and am looking for a way to either stuff the rockwool into a shell and clam that shell around the pipes, or to cover the rockwool wrapped around the pipes so that it stays in place.
I've searched for a few things already but only found readymade shells.
wot_in_ternation t1_j1qw4f4 wrote
Just because you can doesn't mean you should. There's specific products for insulating pipes, just spend the money and use them. You'll save a lot of time and get better results. Find somewhere else to shove the loose rockwool if you really want to.