The Jesmonite Retarder is a 1kg additive designed to extend the working time of Jesmonite resin systems. It allows more time for mixing, pouring, and detailing before the material begins to set.
Extends working time of Jesmonite AC100, AC200, and AC300 resin systems
1kg powder format — sufficient for multiple batches
Enables detailed finishing and adjustment during the casting process
Compatible with all three Jesmonite AC resin grades
Das zeichnet Jesmonite Retarder aus
Unlike standard accelerators that shorten open time, this retarder gives craftspersons and model-makers a longer manipulation window. It is formulated specifically for the Jesmonite AC family, ensuring consistent behaviour across AC100, AC200, and AC300 formulations without altering the cured material properties.
Ideal für...
Model-makers, sculptors, and hobbyists working with Jesmonite resin who need additional time for intricate pours, layered casting, or on-site adjustments. Also suited for workshops and educational settings where longer demonstration windows are beneficial.
Anwendung von Jesmonite Retarder
Measure the required amount of Jesmonite resin base according to the AC100, AC200, or AC300 mixing guide.
Add the retarder powder to the resin and mix thoroughly until evenly distributed.
Pour or apply the mixture within the extended working window — the retarder delays the initial set, allowing more time for finishing.
Allow the piece to cure fully after placement; the retarder does not affect the final cured hardness or appearance.
Jesmonite is a UK-based manufacturer of resin-based casting and modelling materials, widely used in art, design, and craft applications. The brand focuses on high-quality, easy-to-use products for both professional and hobbyist users.
It extends the working (open) time of Jesmonite AC100, AC200, and AC300 resin systems, giving more time for mixing, pouring, and finishing before the material sets.
It is compatible with Jesmonite AC100, AC200, and AC300 resin systems. Use the recommended mixing ratio for each grade as specified in the Jesmonite mixing guide.
Follow the Jesmonite mixing guide for the specific AC grade you are using. The 1kg powder format allows multiple batches; exact ratios depend on the resin system and desired working time.
No. The retarder only delays the initial set time. Once fully cured, the material retains its standard hardness, appearance, and performance characteristics.
Yes. It is a straightforward additive — simply mix it into the resin base according to the guide. It is useful for anyone who needs more manipulation time, regardless of experience level.
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