2 in 1 Ice Preventer and De-Icer. The night before, spray on Demon Ice and leave it. No ice will form, and you can just drive away in the morning. As a de-icer, watch the ice melt from your car instantly, and it also helps to prevent re-freezing when left on the glass. Demon Ice is a concentrated formula for safer winter driving. Protects against freezing to -20°C. Pleasant cherry fragrance. Directions for use: The night before expected frost: Shake bottle well, apply onto the glass. Do not wipe off. In the morning use windscreen wipers and screenwash to remove any excess product and traces of ice. For windows without wiper blades, use a squeegee to remove the product prior to driving. To De-Ice: Remove any heavy deposits of snow. Spray close to the windscreen, starting at the top, move across and work down holding the spray in an upright position. Clear excess product with windscreen wipers or a squeegee for windows without wipers. Certain weather conditions will affect the product performance. If it should rain, or if other precipitation should wash the product from the surface, product effectiveness will be reduced. As a result, re-freeze or further frosting may occur.