The Drum Pal® Covers are the best protective covers available for 55 gallon steel drums. They can be reused dozens of times and receive no damage when filled drums are stacked on top of them. The lid tightly snaps onto the drums, keeping the weather and critters out. They are flexible and stay so at -50°F, and they hold their shape at 275°. Made of an FDA compliant LLDPE (linear low density polyethylene) material, they will work with a variety of products. They have a highly cut and tear resistant material and resist ultraviolet light and most chemicals.