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Old 06-17-2013
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Re: Experience installing portlights without fasteners?

Going by the product sheets it looks like both are very similar. I believe I used 791. I was specifically concerned with the adheasion to gelcoat/fiberglass and acrylic. Which ever one stuck better to both of those materials was the one I used.

Silicon, 4200, and other sealants didn't last more than a couple months. Just routine sailing wouldbreak the seal and I used mineral spirits to desolve it. The Dowel Corning stuff is like contact cement. I don't know how on earth I'll ever get them off, but they sure aren't leaking either...
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