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Brian Nystrom

RW Salnick wrote:
inscribed in red ink for all to know:
I did not have any luck with storing polyester resin. I soon learned
that the resin has a shelf life.
When I purchased the 1 gallon I now have I did not know how long it
stood on the shelf before.
The first year I used about 1/4 of the gallon and stored the rest for
the following year at room temperature.
Then the following spring I used some of the resin and quickly found
out that it did not cured at all after several days.
I bought new resin and it did cured well. Now I have to dispose 1/2
gallon of resin. Legally I cannot closed the gallon and put it in the
garbage. I was told that the resin has to solidified before it can be
disposed. The question is how am I going to solidify the un - curable
resin already in the gallon can?? Conversely I do not have problem
with epoxy resin.

"RW Salnick" wrote in message
...

RW Salnick inscribed in red ink for all to know:

Andrew Butchart inscribed in red ink for all to know:

Autumn has definately arrived here along with colder temperatures. I
have a couple of gallons of polyester resin that I'd rather not move
into the house. It's in a plastic pail right now and the "scent"
tends
to spread. I've tried putting the pail into a garbage bag but can
still smell it.

Would it be harmed if I just left it in the shed and the temperature
falls well below freezing? I'm hoping for enough nice days to finish
my hull but can't count on it.

Andrew B

Actually, storing it in a cool or cold place is one of the best
things you can do to preserve it. Styrene freezes at -31 C, so you
will likely be well above its freezing point. But even if it did
freeze, it does not swell when freezing, so there is no risk of
bursting the container.

bob

answering my own reply - geez

OK, styrene is only one of the components of polyester resin. It is
still true that cool/cold is good, and that it will not swell if it
should actually get below the freezing point.

bob

Perhaps it is the hardener which has gone bad? This is a very active
chemical (an organic peroxide). But I've never had that happen to me,
even with 5 year old hardener...

I've had some that seemed to have lost its potency. It's easy to find;
even Home Depot and Lowes have it.