NEWS: Shell ShockŪ Self-Thickening Brushable Plastic
Smooth-On Mold Making and Casting Materials
Home Technical Info How To Frequently Asked Questions Media Gallery News Find a Distributor Mold Makers Directory
McAfee SECURE sites help keep you safe from identity theft, credit card fraud, spyware, spam, viruses and online scams
About Us Seminars Tech Support Contact My Account Buy Now Smooth-On Home enews
Material Calculator
and Unit Convertor
Custom Formulating
Newsletter Signup

Get Smooth-On's Greatest Catalog Ever! Click Here
Shell ShockŪ Self-Thickening Brushable Plastic
brushinshellIn response to customer requests for a "non-fiber filled" thixotropic plastic that will hold a vertical surface, Smooth-On has developed a product we are calling "Shell Shock®". "Shell" because because the plastic can be used to form a shell and "shock" in reference to this product's good impact resistance vs. other products on the market.

Applications - Shell Shock®is ideal for making fast, lightweight rigid molds and for creating silicone appliances and effects (use as a replacement for ‘stone molds'). You can also brush a "gel coat" into a rubber mold and back it up with rigid foam, creating a highly detailed lightweight casting. This product can be brushed onto styrofoam (polystyrol) as an impact resistant coating that can be sanded, primed and painted (minimum 3 coats recommended).

Shell Shock® can also be used to make thin, lightweight rigid support shells (mother molds) to support brush-on rubber molds. It is mixed 1A:4B by volume and steadily develops thixotropy (becomes thick). Applied in thin sections, the mixture will hold a vertical surface. Like any brush-on material, if you apply too thick it will sag.

Pot life is on the fast side at about 3 minutes which helps with thixotropy, but you have to be aware of your working time. The material will stick to itself, so you can quickly build 3 to 4 layers to a minimum recommended thickness of 3/8" (1 cm) which is recommended for impact resistance. Time between coats is about 15 minutes depending on mass. Do not disturb the previous layer. Material cures in about 1 hour at room temperature (depending on mass). Gel time and cure time can be reduced with mild heat.

How Is Shell Shock® Different From Plasti-Paste®? Plasti-Paste® is heavily filled with fibers which provide strength and make Plasti-Paste® a good "mother mold / support shell" material. The fibers make Plasti-Paste® thick to the point where you can trowel the material onto surfaces without thickness limitation. Cured Plasti-Paste® exudes an oil that makes it difficult to paint.

Shell Shock® is a different product that chemically thickens and is best applied in thin layers. Applied more like a brush-on rubber (such as Rebound 25®) Shell Shock® wets out nicely on a variety of surfaces. When cured, it is harder and more rigid at Shore 85D (vs. 70D for Plasti-Paste®). Shrinkage on Shell Shock® is very low at .0006 in/in. (cm/cm). You can also sand and paint Shell Shock®.

shells7_156  shells8_152
Shell Shock® can be used to make lightweight rigid
molds for creating silicone appliances and effects.

Technical Information - You Will Need Adobe Reader To View These Files
Smooth-On, Inc. Copyright © 2015
5600 Lower Macungie Road, Macungie PA 18062 | Order Desk: 800.762.0744 | Fax: 610.252.6200 | Tech Help: 800.381.1733 or 484.546.0466
Seminar Entrance: 1725 Willow Lane, East Texas, PA 18046

E-Commerce Solutions