DINITROL 449 is an environmentally friendly black coloured bitumen based underbody and stonechip coating with good corrosion protection and sound deadening properties. After curing DINITROL 449 has a very durable tough and elastic film, which results in a very good stonechip resistance. The product is NOT overpaintable please see additional information below. DINITROL 449 is applied mainly in the automotive aftermarket with cars, buses & trucks. The waterborne underbody coating provides extra strong corrosion prevention and changes colour when drying once applied.