Foundry bentonite binds sand particles which results in the mold strength. The main advantage of bentonite is an ability to restore its properties after extra moistening. This makes it possible to use the foundry sand after pouring metal and knockout of casting several times.
This sodium-based bentonite is capable of swelling approximately 15 times its dry volume. In molding sand, it helps molding maintain its dimensional accuracy and provides a greater dry/hot strength.

Packaging : Foundry Bentonite is available in 25 kg sacks and 1 ton jumbo bag.