Originally Posted by Kennibear
System 3 has a family of epoxies aimed at the composite industry. Their T-88 is a rubberized low temp curing structural adhesive that is very impact resistant and has excellent physicals after cure. It has a long pot life and can be mixed with glass flock. It will bond anything to anything. They have Met-Weld which I believe is an aluminum filled metal bonding epoxy that would work. Hysol sells a range of epoxies that cover the gamete and are in dispenser tubes that mix it correctly coming out of the tip. Their Hysol E-120 has a pot life of two hours but requires a 150 degree F cure and develops full strength after a post cure of 8hrs @250 F. It replaces welding on aluminum aircraft structures. After the post cure it is stable past 350 degrees F.
The Chemical Companies need not develop any new products. We just need to figure out which one works best.
That is the reason that I always recommend compounds designed for bedding. They are all based
on some form of epoxy with different strengths, fillers and pot life.
The bedding compounds that I like have good strength and toughness and also a pot life of at least
1 hour + @ 70o and do not heat up over 150o (This minimizes shrinking after the compounds
cure and the metal cools .
If the bedding compound is to hard it will chip and ruin the bedding, some compounds are to soft
and never hold the action firmly.
A poor choice can lead to a poor bedding job so chose wisely and it will last and perform well
for many years.
J E CUSTOM