Special HD Cal Clean is an extra-strong liquid detergent containing surface-active agents, grease solvents, alkaline cleaners, corrosion inhibitors, and water conditioners specifically designed for cleaning electronic air filters.

Electronic air filters can become coated with tobacco tars and other deposits that are very difficult to remove with ordinary detergents. HD Cal Clean will rapidly clean dirt, grease, dust and tars from the plates on these filters and, it will not corrode or tarnish aluminum or other metals when used at the recommended concentrations