Item DescriptionLabelmaster’s Grade 4-A, Extra-Course 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 4GV packaging accessory is chemically inert, asbestos-free and can absorb liquids and spills of all kinds. Approximately 1.75 cubic ft. of Vermiculite absorbs three gallons of water. Absorption may be different for certain chemical spills. It is sold in 4-cubic-ft. bags.