Philip
All the resin and hardener I got with my kit went out of 2 yr use by date
before I had make anything other than the test chock.
I just recently gave two unopened containers of 1996 manufacture and the
associated slow hardeners to a friend who has completed and flown his
Europa. I really have just begun building with resin from a more recent kit.
He made trial mixes from each which set in the cup at about 1/4 inch thick.
Both samples look good and give a good "ring" when struck together. He
thinks they compare favourably with those of new material which he has.
I tried to find out about suitable tests from Standards Association of
Australia, but I only found material on fibre glass pipes. I thought there
should have been engineering tests such as breaking beams to get a tension
reading or a compression test as for concrete specimens which we could use
to assume the tension or compression measures against tests on new materials
and so rate our outdated materials as suitable or not suitable.
No useful information gleaned so far.
The only answer I have had to our question is that you can have a laboratory
test done in the UK for 250 UK pounds.
Hope we get some answers!
Best Wishes from JR (Bob) Gowing UK Kit No 324
24 High St Bega NSW 2550 Australia
----- Original Message -----
From: <philip.lincoln@ESSNET.SE>
Subject: Use-By Date of Hardener/Resin
> A bit of a break at the moment but I hope to be back building soon. In the
meantime a question...
>
> I understand that the shelf life of the epoxy hardener & resin is 2 years.
I have some slow hardener left with the manufacturing date 11/98 on it. Does
this mean it should be okay until the beginning or end of 11/2000? I'd
really like to use it for my last "big" layup (top of a flap) to have more
working time, and want to avoid buying more hardener (I have a lot of
standard left that was made 02/99).
>
> Thanks,
>
> Philip (Tri-gear, #426)
>
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