is some nasty sticky chit.
builder I do a lot of work for called me up this morning and asked if I could do him a favor run by a condo I did for a couple of months back and fill in a couple of canister light holes in the ceiling. I tried shooting it up in there and that crap fell out all over me.
don't think I'll ever get it all off. I went back earlier and covered the holes with cardboard and poked a hole to stick the nozzle through and fill it up, don't want to ever get this chit on me again.