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Old 04-09-2008
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The epoxy is water-tight without the glass matt, but I would use some layers of fiberglass cloth over the areas that had the original cracks to reinforce and strengthen the area. I generally don't recommend using fiberglass matt with epoxy since, IIRC, much of the fiberglass matt is sized with a compound designed to help it work with polyester resins, that is harmful to it bonding well to epoxy resins.

Resin, by itself, is very brittle and not very strong. The best fiberglass layup has very little resin in it... and is mostly fiberglass with just enough resin to wet it out and bind it properly.
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You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

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