Our foundry bentonite has good adhsion,expansive,fire resstance an palasticity.Has strong abilit of Anti sand,scarrying,collapse Foundry bentonite Our foundry bentonite has good adhsion,expansive,fire resstance an palasticity.Has strong abilit of Anti sand,scarrying,collapse .With the characteristic such as high strength,high temperature resistance and high complex,improve casting surface finish, ...