I have been trying to make press molds for my hydraulic press
out of devcon liguid steel. I have tried silican spray and
vasoline for release agents to keep the epoxy from sticking to
the model as well as itself. neither works. also looking for a
cheaper material. anyone had any success? need release!
Try some wax. Automotive wax should work,use the traditional
type that needs buffing. Use several coats (5-6) allowing a
really good dry after bufffing and between coats-1/2 hour plus.
Also care should be taken not to allow the epoxy to get too hot.
If it is applied too thick it will create a lot of heat
(exothermic reaction) and this will inhibit release. An
alternative to epoxy might be fiberglass w/polyester resin. A
small repair kit should be avalable at an auto parts store much
cheaper than a quantity of Liquid Steel. I used to work in the
boat industry and have built molds for tiny parts up to 60 foot
boats. I is no fun when your mold doesn't release from your
model. I know! dave