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( 3 Reviews ) Write a review on this product!
  • 16 oz.


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Liquid latex rubber for making three dimensional molds. Just brush several thin coats on object you wish to duplicate. Peel off a ready-to-use mold. Simple water clean-up. Mold builder can be used for casting candle wax, plaster, and casting resin. Available in 16 oz. jar.

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Product Questions and Answers

Can Mold Builder be rejuvenated after a long storage time? It has become like butter.

- Asked by Phil on 28-Jan-14

Envirotech describes the normal consistency to be in fact like butter or frosting. If it's dried out, the consistency is like rubber and cannot be rejuvenated. If it gets too cold and freezes, its texture becomes similar to ricotta cheese. The normal shelf-life for this product is nine months to one year if stored at the proper temperature.

- Answered by MisterArt on 29-Jan-14

What is the percentage of solids in the product?

- Asked by Hal Corbett on 28-Jul-13

If you are calculating the shrinkage factor then the manufacturer says it is 60% solids. Keep in mind that this product is meant to be brushed on in thin layers.

- Answered by MisterArt on 29-Jul-13

Can I use Liquid Rubber to coat the inside of a flower urn to plug the hole and protect the inside of the urn and, therefore, create a liner that will hold water?

- Asked by Lorraine Bray on 30-Nov-12

The Mold Builder Liquid Rubber does contain ammonia. This would be harmful to the flowers.

- Answered by MisterArt on 01-Dec-12

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Customer Product Reviews

Rated by: Judy V. in Chino Valley, AZ
This mold maker is easy to use, but it kind of shrinks after the mold is done. Judy V.
Rated by: Bill D. in Port Aransas, TX
I have used mold products beginning in 1948 and originally used it in manufacturing molded products. I am currently using the E-Tech liquid rubber for mold designs and for boat repair. The boat repair includes coating canvas boat tops which waterproofs the canvas and prevents deterioration of the thread used to sew the canvas tops. It is an excellent product.
Rated by: Margaret T. in Washington, DC
Great stuff. Easy to use.

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