Features and Benefits Powerful cleaner removes grease, grime and dirt Safe for most under-the-hood rubber and plastic parts Fast acting DFUs for Foaming Engine Degreaser WARNING! Do not spray on hot engines or hot surfaces. Vapors may ignite explosively. NOTE: May mar, discolor, or stain finished, painted, or plastic surfaces. Remove overspray immediately with soapy water. Remove the black safety cap and spray a wet heavy coat onto the surfaces to be cleaned. Wait 1 to 2 minutes to allow the cleaner to dissolve and penetrate. Rinse the surfaces with warm water to remove the residual cleaner and contaminates. Repeat applications may be necessary to remove heavy deposits. Replace black safety cap and store or dispose of properly.