When I patched a 3" thru hull hole on my 3/8" thick HR28 hull,
all polyester glass, I used a 'feathered' polyglass patch and
could not see it after it was done. I cannot imagine the bond
failing, I tried to dig at it with an awl, etc. There is no way
I would not use epoxy to repair polyester, because from then on
you would need to cover it with epoxy. It would complicate even
bottom painting. Grind out all the epoxy, rough sand, clean with
acetone and restore it to like new with like material.

Don't think about it too much. Do it like the pros do. Feather
the edges inside and out, and learn how to mix and glop
polyglass.

If you are worried to the point of doing engineering studies
hypothecated on driving over rocks, you would do better to study
the charts.

Opinions, opinions, ever'body gots opinions.

Terry K

Walt wrote:

I have a polyester/ glass laminated part (gelcoat on one side) and I
need to repair a hole in it. In the past, Ive sanded the
glass/polyester, cleaned it up with acetone and then used west epoxy and
"boat tape" glass. The polyester part is about 4 years old.

This works reasonably well but the bond doesnt seem as good as the
original polyster glass to glass laminations or if I were bonding epoxy
to epoxy.

Any suggestions on a really strong way to fix holes in polyester
laminated structures or improvements on what Im already doing would be
appreciated.

Regards,

wh

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