I’m not familiar with that
particular epoxy – BUT – any good epoxy worth putting on your
airplane will have a pretty narrow ratio requirement. The MGS I use has a band
of +/- 5% before it stops being hard and only cures to a “leather”
consistency.
Also, heat is required for most all
epoxies to do their chemical dance.
You may also make sure that you are mixing
very very well. You’ve got to get all those hardener molecules close to
their receptor resin molecules so they can link up.
Is the hardener crystallized at all?
Sometimes with age and cold temps hardeners will crystallize (or clot).
Most times you can get it back to its liquid state by heating to about 150F for
five minutes or so.
That’s all I can think of.
Regards
Joe Hull
Cozy Mk-IV #991 (Done! In Phase1 Flight
Test 0 hrs)
Redmond (Seattle),
Washington
From: Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net] On
Behalf Of John Downing
Sent: Thursday, January 26, 2006
11:16 AM
To: Rotary
motors in aircraft
Subject: [FlyRotary] Epoxy
Question for you glass fellows. Yesterday I laid up
some cloth on the cowl and it didn't harden. I put some heat on it
with the heat lamp and left it over night and nothing. This
morning I put the heat lamp on it and pulled it off, scraped it and ground
the area, wiped it down again with acetone and tried again. The epoxy is
United Resin Corp. Uni-Lam. The shop is hot water heated with pipe in the
floor and this epoxy is supposed to work at room temperature..The ratio by
volume is 1 to 3.8, it has been working ok by using a marked stick in a
soup can, but I'm wondering if this ratio is hyper critical. Any input
would be greatly appreciated. JohnD