Pour the mixture into the rubber mold. Dust the back of the casting with a hair dryer to break any bubbles just before the resin gels. Demold when firm in 10 to 60 minutes. Let the casting cure flat overnight. You may want to insulate larger castings so they will cool slowly.
Fillers are optional.
We can recommend when you order. For making Machineable Plastic and patch repairs, refer to it s own brochure and instructions. A quality casting will be smooth and dry on the back surface. Ask us for recommendations. The cured castings can be primed and painted.