Anyone ever use exhaust wrap on a radiator hose ?

pour yourself a tall vodka and don't worry about it. the hose is probably as hot as the engine and the ambient temp around the pump, hell, probably the pump body itself.

if it really concerns you, for a bucks down option cut up a bike tire or something and use it as a buffer between the two where they're touching. otherwise mc master has all kinds of hi-temp sleeving that would work.