Our 30" x 30" 2 mil plastic drum cap sheets protect contents of a 55 gallon drum from contaminants such as water, grease, dust, and other outside elements. Also, these 30 x 30 plastic sheets are used as a barrier between a metal drum lid and your products. These clear plastic cap sheets .002 are low density poly covers used for covering and protecting drums, pails, and containers that are packaging products such as foods, chemicals, pharmaceuticals, as well as many other industrial packaging applications. 30x30 2 Mil Plastic sheet drum covers for a 55 gallon drum extend the life of containers and allow for a cleaner environment when processing any product. Leak resistant.