Jesmonite Retarder For Extended Working Time

Jesmonite Retarder For Extended Working Time

Regular price $29.00 Sale price $14.50 Save $14.50

Only 8 items in stock!

Prices reduced to clear an older batch. Rest assured that product is sealed from factory and usability is not affected. Jesmonite has advised that shelf life of 18 months starts from when bottles are opened. 

Jesmonite material setting times can be extended by the addition of Jesmonite Retarder to increase working time.

Please select the correct retarder compatible for the material that you are working on. There is a retarder for Jesmonite AC100 and a separate one for cement-based Jesmonite AC730.

Please note that you should perform tests in the workshop environment, as extremes of temperature and humidity can effect set times. Jesmonite Retarder can be added to the pre-weighed liquids to extend the pot-life of the mixed material. 

Typical inclusion rates are between 2g–8g, however a small test is recommended, as the precise timing is dependent on both temperature and mix size. 2% addition will make the set time approximately 25-30 minutes.

1 bottle contains 1kg of retarder.


Technical Data Sheet



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