On Friday, October 26, 2007 7:04:57 PM UTC-4, dbr wrote:
Is there a way to use only part of a can of urethane insulating foam spray, and
save the rest to use later? I find if you don't use it all right away the nozzle
and dispenser tube permanently clog.

I have tried carburetor cleaner immediately after I am finished foaming something. Remove the nozzle by unscrewing it and spray cleaner into the opening until it comes out the other end. I doubt this will work if the foam has dried, however.