On Jun 30, 12:54*am, Smitty Two wrote:
In article ,





*"campbell_09" wrote:
I want something like epoxy but that will not dry hard and brittle. *Tried
the standard 50/50 mix with JB Weld on a piece of cardboard and it cracks
when bent, but I understand that this is way it was designed.

On another test piece I put 75% hardner and 25% "steel", then next to (not
touching it) did *a spot of 75% steel and 25% hardner. *17 hours later
neither one seems cured.



1. I don't think most epoxies tolerate a lot of variation in the
prescribed mix ratio. I wouldn't expect your experiment to work out well.



Agreed.

The prescribed epoxy mix ratio gives optimum strength and adhesive
power. Fiddling with the mix degrades the final product. They will
tolerate some deviation but too much moves you from hard to "cheesy"
to sticky, unusable mess. If you want flexibility, start with a
flexible resin, i.e. silicones or urethanes. There are non-curing
materials that set by water or solvent loss that might be useful
(acrylates, PVC)

Regards
-J