Our 3M™ Undercoating protects vulnerable automotive metal parts from corrosion and abrasion. Specifically designed for automotive undercarriages, wheel wells and body panels — quarter panels, under hoods, trunks, undersides of floor pans — it's equally effective in many other automotive applications. Multi-purpose aerosol undercoating is available in a rubberized formula that can be painted. - Once applied, this product requires a 30 min cure time before it is fully set and provides maximum strength. High quality finished appearance and function.