Set times of all Jesmonite composite materials can be extended by the addition of Retarder to increase working time. There is a Retarder for AC100, AC200, and AC300, and a separate Retarder for the cement-based materials AC730, AC830, and AC930. Please note that you should perform tests in the workshop environment, as extremes of temperature and humidity can affect set times. Addition rates can be found in the individual composite user guides located below.
JESMONITE® Retarder is available in 1kg and 5kg sizes.