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What is Casting Resin Catalyst?

Published in Resin Casting 1 min read

A casting resin catalyst, often called a hardener, is a substance added to liquid casting resin to initiate the curing process.

Added to liquid casting resin, catalyst (hardener) produces a chemical reaction, which generates heat, causing the resin to harden.

This crucial component is responsible for transforming the liquid resin into a solid, durable material, suitable for various casting applications.

How Does a Casting Resin Catalyst Work?

The function of the catalyst is simple yet vital. When mixed with the liquid resin:

  • It triggers a chemical reaction.
  • This reaction generates heat, a key indicator that the curing process is underway.
  • The heat and chemical changes together cause the resin to harden over time.

Without the correct amount of catalyst, the resin would remain liquid or cure improperly, resulting in a soft or sticky final product. The precise ratio of resin to catalyst is critical for achieving a complete and successful cure.

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