Dinitrol 410UV Black Joint Sealer. After welding, you must always seal joints between panels properly, preventing future corrosion caused by moisture seeping into the joints. Dinitrol Joint Sealer is easy to apply with a standard caulk gun and dries within hours ready to paint. Caulking gun not included. DINITROL 410UV features - One component polyurethane sealing and adhesive compound. - Fast drying, elastic and can be over-painted. Immediate over-painting is possible - wet on wet - however, do not use paint with alcohol or alkyd-resin. - Used for attaching plastic body panels, spoilers, body kit, scoops and vents to bodywork. - UV resistant. Also available in White . * Product contains Isocyanates.