Purosil is one of the leading engineering firms in the United States. The company has been operational for more than 40 years. Located in Corona, Calif., it is an affiliate of Mission Rubber Company. Purosil specializes in coolant, heater, charge-air and turbocharger applications. The company manufactures a wide variety of products, such as vacuum, coolant, performance flex, silicone, wire reinforced flex, hump and air intake hoses, inserts and sleeves, and elbows. It also provides products for automobile industry and formed, extruded and molded equipment. Purosil employs more than 50 experienced computer-aided design specialists, industrial and mechanical engineers, contractors, and research specialists. The company s operational engineering group has more than 60 years of combined experience in quality testing and manufacturing services.