Buck Turgidson wrote:
I need to fill a hard to get cavity with the expanding foam
insulation (e.g. Dow Great Stuff). However, the spray tips aren't
nearly long enough. They're about 8", I need 24".

I know I can buy the tanks of foam, but this is a very small job.

Anyone tried extending the tips? I tried telescoping them together,
along with some Gorilla glue, but it blew out immediately.

If you can get the can all the way down the hole, you can shoot it.