Labelmaster’s Vermiculite is a great choice for providing absorbent cushioning when packaging hazardous materials that may accidentally leak or spill during shipping. Ideal for use with UN-certified wooden boxes. and Variation Two shippers , this Grade 2- A Medium 4GV accessory is chemically inert, asbestos-free and can absorb liquids and spills of all kinds. Sold in 4-cubic-ft. bags, approximately 1.75 cubic ft. of Vermiculite absorbs three gallons of water, and absorption may be different for certain chemical spills. .