Bentonite is an absorbent clay used for special effects purposes; it will give a grey dust when in air with a pyrotechnic driver and can be used as a bulking material for simulated mud puddles. Can also be used as a thickener. As with any dust product, respiratory protection must be used. Sold in 3.5 lb containers for easy application. 40 lb bags also available, contact us directly at firstname.lastname@example.org.