Douglas Products is a leading manufacturer of specialty chemical products for pest management, thermal fluids, and sanitary sewer applications. Douglas also has a Special Projects Division to meet your specialty chemical project management needs. A family-owned and operated business since 1916, Douglas has earned its century old, excellent reputation for quality products and customer service. Effective, high-quality chemicals help the environment by lowering use rates and resistance. The more effective the chemistry the less you need to solve the problem.