Viper is a potent degreasing compound that does not contain any hazardous ingredients or give off toxic fumes. Use it to clean small indoor kitchen equipment, condenser and evaporator coils. No need to rinse the evaporator and the condenser only needs a light water rinse for minimal clean-up. The aerosol injector produces a pin spray of expanding foam that penetrates deep in between the coil fins. The foam will liquefy after a few minutes removing heavily imbedded grease and grime.