Two-part Urethane Adhesive

This is as close to “bomb-proof” as I have found a glue to be. It seems to stick to just about anything, although 3M says it’s for metals and plastics. I have used it for gluing D-rings – and other things – into my whitewater canoes. The rings have been able to hold me boiling through big rapids, often upside-down. For this application the glue joint needs to be flexible and waterproof…and this stuff hasn’t ever failed me. How it is different from epoxy: Fills gaps. Flexes under stress without giving away. Sticks to smooth plastics like PVC or vinyl. Seems a LOT stronger than epoxies. You’ll have to find this in a specialty store or order it over the web.

-- Fen Sartorius  

3M Scotch-Weld 3532 B/A Urethane Adhesive
$30, 2 oz. tube kit (6 per case)
Available from Hillas Packaging