IMPORTANT: Retarders are not interchangeable for AC100/200/300 vs AC730, ensure you use the correct retarder.
The working time (also called pot-life) of mixed Jesmonite is approximately 8-15 minutes depending on your environment and mix size.
The addition of the appropriate retarder can extend this closer to 30 minutes at a maximum inclusion rate of approximately 2%.
The typical inclusion rate of AC100/200/300 Retarder and AC730 Retarder is approximately 2g-8g per kg of mix. Please perform tests in the workshop environment as varying temperature, humidity, and mix sizes can affect set times and pot life and the necessary addition rate will vary.