Spray Liquefy directly on to areas of your vehicle with built-up tar and glue deposits. The product will quickly break down these contaminants allowing you to either rinse them away or remove using an appropriate cloth. Do not allow Liquefy to dry on your paintwork or glass. If you are unsure an area is safe to have Liquefy applied, test in a hidden area first. Do not use on any un-painted plastics.