I typically have gone to West Marine for epoxy. 5:1 mix ratio with
metered pumps. Good idea about avoiding the glass expander/thickener
micro bubbles. :-) Fast, med and slow catalyst available.
Dave
On 2/14/22 2:10 AM, Gregg Eshelman via Emc-users wrote:
Modern epoxies like the ones sold by Total Boat set up harder and don't yellow
like the epoxies of the 1980's and earlier. An alternative to epoxies are the
hard urethane resins, also typically made with UV protection.
Total Boat looks like it's the #1 brand of epoxy used by people making those
"river" tables and mixing all kinds of weird stuff with epoxy to turn fancy
bowls on wood lathes.
On Sunday, February 13, 2022, 06:16:31 PM MST, Chris Albertson
<albertson.ch...@gmail.com> wrote:
It is not the epoxy that is so hard. It is the filler they mix with the
epoxy. Many times it is a kind of glass, not unlike what they use to make
sand paper. Other times they mix finely ground bits of steel.
I used to use a brand of epoxy that sold bottles of pure resin and cans of
filler. I could mix what I needed for the job. Sometimes I'd use "micro
balloon" filler these are tiny hollow balls of glass. A gallon tub of them
weights about as much as an empty tub. Mixed to a thick paste, it cures to
a foam you can and with a sure-form rasp. But if you mix the same resin
with chopped fiberglass or chopped kevlar fiber it is as hard as stone and
you'd need an angle grinder to smooth it down. I was building small boats
and canoes.
Yes epoxy can be damaged by UV light. If doing a gunstock, put 4 or 5
coats of exterior marine varnish over it. The marine stuff has UV blockers
(sunscreen) in it.
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