Apply Underbody Sealant with a 7cm brush all over the underside of the vehicle, leaving about a 2mm coating. To completely seal the car against drumming, apply a coat inside the door panels and on the bare metal floor of the car. To remove Tetroseal Underbody Sealant from paintwork, wipe off immediately with white spirit. Ensure the surface to be treated is dry and free from old flaking underbody sealant, loose rust, dirt & grease. Tetroseal Underbody Sealant has been specially formulated to protect vehicles against corrosion, rust, stones, salt and water, extending the vehicle life and helping to maintain value. Tetroseal is a technologically advanced, highly structured underbody sealing compound which is particularly resistant to sagging when applying and provides excellent sound deadening qualities.