... adhsion,expansive,fire resstance an palasticity.Has strong abilit of Anti sand,scarrying,collapse Foundry bentonite Our foundry ... adhsion,expansive,fire resstance an palasticity.Has strong abilit of Anti sand,scarrying,collapse .With the characteristic such ... and improve the finished product rate.The technical index of casting soil products NumberContentQuality index1Wet compression strength KPa≥ ...