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  Sealing stress cracks....Zap-a-gap ?

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Author Topic:   Sealing stress cracks....Zap-a-gap ?
Drisney posted 05-04-2003 11:37 PM ET (US)   Profile for Drisney   Send Email to Drisney  
I have been wondering if cyanoacrylic glue might be the answer for sealing stress cracks in fiberglass. The stuff is very fluid; capilary action should draw it in quite well. Has anyone tried it for compatability on fiberglass?
bsmotril posted 05-05-2003 10:05 AM ET (US)     Profile for bsmotril  Send Email to bsmotril     
Done that. It turns yellow within months of exposure to sun. I consider it a temporary fix until a permanent cosmetic repair can be made.
John W posted 05-05-2003 02:30 PM ET (US)     Profile for John W  Send Email to John W     
As you probably know, to make a stress crack fix permanent with gelcoat, you first need to stop the (slight) flexing that caused the crack to begin with. But if all you're trying to do is prevent water intrusion into the laminate at the point of the crack, and you don't care too much how it looks, just put white silicone in the crack. It's flexible & waterproof, and will last indefinitely.
Drisney posted 05-05-2003 06:59 PM ET (US)     Profile for Drisney  Send Email to Drisney     
Thanks for the replies. I am thinking of water intrusion and hoped that it might be a good seal but sounds like not. I don't know if i can get silicone caulk in these hairline cracks....Dave

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