CarPlan Demon Ice is a 2 in 1 Ice Preventer & De-Icer. The night before... just spray on and leave, Demon Ice stays where its sprayed. No ice will form... Just drive away in the morning. As a De-Icer... watch the ice melt from your car instantly, also helps to prevent re-freezing when left on the glass. Demon Ice is a concentrated formula for safer winter driving.