Below is a list of Plastic Barrels manufacturers from Hayward, California. Plastic barrels are a type of closed-top drum that are ideal for the mixing, storage, dispensing, filtration and transportation of many materials both liquid and solid. While steel barrels and fiber drums are also commonly used, plastic barrels are often preferred due to the durability of the material and because plastic is not susceptible to corrosion and is therefore able to be used for long term storage without concerns of product contamination.