Radiator Specialty Products produces and sells gunk literally. A developer, manufacturer and distributor of automotive chemicals, hardware, plumbing and traffic safety equipment, the company s products are sold under the Gunk, Solder Seal, Tite-Seal and Douglas Tools brand names. Its more than 4,000 specialty chemicals include Liquid Wrench, Engine Brite, Puncture Seal and Carb-Medic brand products. The company s other products include brake cleaners, diesel fuel additives, starting fluids, deicers, lubricants and degreasers, as well as equipment such as safety vests, road signs, safety cones and sand barriers. Radiator Specialty Products was founded in 1924. It has headquarters in Charlotte, N.C., and operates manufacturing facilities in North Carolina, California and Canada.
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