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Message: [QUOTE="Waterbug, post: 222080, member: 2322"] No way to tell. For sure drilling holes at the end of the crack is a good idea to maybe stop/slow the crack from getting longer. Once there's a crack the thermal stresses would be even greater than before I should think. I do think the foam would be a very short term fix. Trouble with most of these fixes is binding different materials together all expand and contract at different rates so the bond gets broken. Not to mention bacteria getting in between. If you really wanted to try and make a long term fix I think you'd really have to pull it and weld from both sides. Or cut a metal plate to cover the crack, and a neoprene gasket and bolt the plate and gasket to cover the crack. If you do that drill the holes in the plastic a little large for the bolts to allow for expansion/contraction. Otherwise they'd likely crack the plastic even more. But sounds like a lot of work to me. [/QUOTE]