I think water weld is as an underwater epoxy, regular JB (which is what I used) should hold up okay since I allowed it to cure in a dry environment. In this case, the plastic is fairly porous, I made sure that it bonded to it before I went crazy and gooped the whole thing. I'll admit though I probably would have used water weld if I knew about it. I'd like to recommend the metal sleeve to anyone with an original radiator, its cheap insurance. Also, Pawo's suggestion about using 2 clamps is a great one as well!

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TC
Current stable:
- 2004 Mazda RALLYWANKEL
- 2007 Saturn sky redline
- 2004 Explorer...under surgery.

Past: 135i, GTI, 300E, 300SD, 300SD, Stealth