Petroleum Sorbent Drum Cover is designed for use on a 55 gallon drum to catch drips and spills that occur during the dispensing. The 3M drum cover is the most versatile on the market. The Drum Cover is a selective sorbent which will absorb Hydrocarbon-based liquids (oleophilic) and repel aqueous-based liquids (hydrophobic). Size 22 in. 25 per case