Plasti-Paste® is a two component fiber resin that is designed for vertical surface application. Plasti-Paste® holds a vertical surface without sagging and cures to a strong, durable and lightweight plastic. Suitable as a mother mold / support shell (reinforces shape of rubber mold during casting), or as a laminating material. Can be pigmented with So-Strong® color tints from Smooth-On. Add URE-FIL® 9 or other filler as an extender or for special effects.