How To Make a Brush‑On Mold Using Dragon Skin™ Silicone Rubber
Step 7: Applying the First Part of the Plasti‑Paste Support Shell
The support shell will be created with Plasti-Paste® filled urethane plastic, which is highly adhesive. Prior to applying Plasti-Paste®, brush Sonite® Wax over all surfaces the support shell material will touch. Spray an even coat of Universal® Mold Release over all surfaces that will come in contact with Plasti-Paste®. Smooth-On's Plasti-Paste® filled urethane plastic is designed for use as a support shell. It is mixed in a ratio of 1 Part A to 2 Parts B by volume. Mix and apply the first batch of Plasti-Paste®.
Plasti-Paste® has a relatively short working time (approximately 10 minutes). It is often best to work with several small batches rather than one large batch. Build Plasti-Paste® support shell to an ultimate thickness of 3/8'' (1 cm). Allow Plasti-Paste® to fully cure (approximately 90 minutes) before moving to the next step. Once section 1 has fully cured, remove clay shim and use a Dremel tool to trim sharp edges and corners.
