NIGRIN Undercoating Protection is a permanently elastic bitumen-wax combination for protecting vehicle undercoating and bodywork against corrosion, road salt and rock chips. It has a great sound absorption effect and can be used to supplement engine and boot hoods, doors and fenders. NIGRIN Undercoating Protection is adhesive, fast-drying and will not drip when applied evenly. It is PVC-compatible and cannot be painted over.