JR-720 is a solvent-free, heat-curing PVC plastisol seam sealer engineered for automotive body-in-white and metal fabrication applications. It cures at temperatures exceeding 140°C, forming a durable, flexible seal that effectively prevents water ingress, corrosion, and dust penetration into body joints. The product demonstrates reliable paintability with common filler and topcoat systems without adverse effects, and exhibits strong adhesion to oiled steel and galvanized steel surfaces. With excellent thixotropic properties, it enables clean, controlled application and is fully compatible with both manual dispensing and automated robotic systems. JR-720 delivers high elongation and robust adhesion to metal substrates, and is designed to be compatible with a wide range of electrophoretic coating systems, ensuring seamless integration into modern automotive production lines.