Mold Making and Casting Supplies


This page contains molding and casting supplies such as release agents, polyurethane foams, and casting powders.

NOTE: Adult supervision required for many items in this section. Some items are for professional use only. If you buy them we must assume you know how to use them. If you don't, please refer to our books and video sections.

NOTE: Plaster, Stone and Gypsum can now be found in its own section.

Release Agents

A release agent is a chemical used to prevent other materials from bonding to surfaces. It can provide a solution in processes involving mold release, die-cast release, plastic release, adhesive release, and tire and web release.

NOTE: All aerosols are 12 oz. and require ground shipping

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Zero Stick Paintable Mold Release, Stoner E342 is a unique, extreamely versatile release agent which is generally acceptable for applications where a food grade release is required. Zero Stick allows molded parts to be painted, plated, hotstamped, adhesive bonded, labelled, or otherwise decorated in most applicalabelled, or otherwise decorated in most applications. Zero Stick provides a long lasting anti-stick film for fast, easy part removal from molds and multiple part releases per application. Improves molding efficiency in many processes including injection, vacuum form, and pour cast molding. Economical - a light coating produces best results.

Urethane Mold Release, Stoner S236 is specially fomulated as a top quality release agent and anti-stick lubricant for molded urethanes and simular materials. Provides fast, easy part removal from molds and multiple part releases per application. Improves molding efficiency in many processes including injection, pour cast, and extrusion molding. Economical - light coating produces best results.

Flammable, Must be shipped UPS Ground.

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Hot Pour Vinyl

Poly Vinyl Chloride (PVC). Same stuff as Creepy Crawlers or artificial fish bait. Also known as hot pour. Melt in a double-boiler and pour into heat resistant mold. Metal or silicone molds work great.

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Polyurethane Foam

Odorless Casting Resin or Plastic Casting Resin. Not completely odorless but is called that anyway. Mix two equal parts of Part A and Part B and compound will form a solid plastic in a few minutes. Great for artists who want to reproduce their own "Resin Kits." Works great in a silicone mold. Color is sort of a amberish, translucent white. Can be painted, but don't use a silicone mold release.

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Yellow Net

Yellow Net

Open weave netting that works great as a reinforcement for plaster mold casting. 48" wide. Price per linear yard (.91 meter). Excellent replacement for hemp.

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Silicone Mold kits

General Purpose Silicone Mold kits

Our general purpose silicone kits come with a base and a catalyst. No need to purchase catalyst separately. No need to de-gas your mixture so no vacuum chamber is required.

You have about 30 minutes of working time, with a 45 minute pot life total. Cures in about seven hours or overnight.

Our materials are made by BlueStar.

EXAMPLE, For a normal 100 gram batch, use the following:
100g Silicone Base material
10g Catalyst material
110g TOTAL

Thixotropic additive thickens the compound so that it can spread on a vertical surface like you would spread frosting on a cake. It usually take about 25 minutes for the thixo to kick. Use 1 to 5% by weight of base.

Steve's recommendations for thixo:
First Layer (AKA The Beauty Coat): Use no thixotropic.
Second Layer: Use 1% thixo by weight.
Third Layer: Use 2% thixo by weight.
All Additional Layers: Use 5% thixo by weight.

EXAMPLE, Batch with Thixo:
100g Silicone Base material
10g Catalyst material
5g Thixotropic material
115g TOTAL

NOTE: There are 454 grams in a pound.

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