Forming and Mold-Making

How to Cast an Ammonite into Concrete
Mixing 2-part Polyurethane Mold Rubber | Concrete Exchange

We love casting high grade ammonite fossils into concrete for a lot of reason but above all we think they’re beautiful. Evidence of the golden mean can be found all around us and we think there’s no better way to accentuate the linear proportions of a well designed countertop than with one of mother natures own perfect designs.

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Sink Knockouts
Using Sink Knockouts | Concrete Exchange

A sink knockout is used to create a void in the concrete for an under-mount sink. It can be made from different materials, but they are typically foam, rubber, or fiberglass. Rubber and fiberglass knockouts are re-usable for many many castings, while a foam knockout can only be used a few times before it should be replaced.

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Sealing a Concrete Form
Sealing a Concrete Countertop Form | Concrete Exchange

Learn step-by-step techniques for sealing concrete countertop forms with silicone, using the right tools and methods to create smooth, consistent edges for a flawless finished surface.

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