Whistle Plus Multi-Purpose Cleaner and Degreaser is specially formulated for outstanding performance on a wide variety of hard surfaces. Just spray on and wipe off dirt, grease, and grime. No rinsing required. For use on countertops, sinks, walls, bathtubs, glazed ceramic tiles, doors, appliances, vinyl upholstery and other washable indoor and outdoor hard surfaces. NSF C1 Listed. It's okay to Whistle while you clean!