Malco CW-37™ Premium Car Wash Concentrate. Designed for use in automatic, semi-automatic and hand car washes. This environmentally-friendly formula produces large quantities of hard working suds, making it the ideal choice for most car wash applications. CW-37 is a unique high lubricity formula that prevents brush marks when used in a foam brush application. Dilutable up to 1:400. Also available in 18.9l drum - (CODE:105705).