[Alberg30] When to use polyester and not

[Scott Wallace]

Hi George,

What would you reccomend for small "chunks" of gelcoat that have come off of my
bow on my Bluesnose fiberglass sloop? I need something with fill in it or else a
coat or two of epoxy to replace the small holes where my sloop hit the metal edge
of the dock coming in to fast...the fiberglass underneath looks fine but the
gelcoat took a beating...

Scott Wallace

George Dinwiddie wrote:

> Stephen,
>
> Whether or not epoxy provides more work time depends on the
> resin/catalyst combination you use.  The pot life of polyester can be
> varied somewhat by varying the amount of catalyst--not so with epoxy.
> Both resin pot life is affected by temperature--the hotter the quicker
> they kick.
>
> Neither resin is particularly strong by itself.  It's the reinforcement
> (generally glass fibers) that provides the strength.  The resin provides
> the rigidity.  With either resin, using the least amount of resin that
> completely wets out the glass will provide the strongest laminate for
> the weight.
>
> I like epoxy, too, but I don't think it's the best choice in all situations.
>
>   - George
>
> sousa, stephen (ENG) wrote:
> > Greg,
> >
> > I have used both and like epoxy. The expoxy provides more work time and also
> > is a stronger product.
> >
> > Stephen
>
> --
>   ----------------------------------------------------------------------
>    Hope your road is a long one.                        George Dinwiddie
>    May there be many summer mornings when,       gdinwiddie at alberg30.org
>    with what pleasure, what joy,                 http://www.Alberg30.org
>    you enter harbors you're seeing for the first time;
>                                             from 'Ithaka' by C.P. Cavafy
>   ----------------------------------------------------------------------
>
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