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Seam Sealant

JR-720 is a solvent-free, heat-curing PVC plastisol seam sealant designed for automotive body sealing applications. It forms a durable and flexible sealing layer after curing, providing excellent protection against water ingress, corrosion, dust penetration, and stone chips.

Product Type	PVC Plastisol Seam Sealant
Curing Type	Heat Curing
Curing Temperature	≥140°C
Substrate	Steel / Galvanized Steel

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Data Sheet:

720 PVC Epoxy Weld Seam Adhesive

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Technical parameters and application recommendations may vary according to substrate, installation conditions and project requirements.

Description

Specifications

Solvent-Free Heat-Curing Sealant for Automotive Body Joints

JR-720 is a premium solvent-free, heat-curing PVC plastisol seam sealer designed for demanding automotive and metal fabrication applications. Curing quickly at temperatures above 140°C, it creates a resilient, flexible barrier that locks out moisture, corrosion, and dust from body joints—ensuring long-term structural integrity. Its reliable paintability works seamlessly with standard filler and topcoat systems, while delivering excellent bonding to oiled and galvanized steel. Engineered with superior thixotropic properties for effortless application, it adapts perfectly to both manual and automated robotic lines. With exceptional elongation, strong metal adhesion, and full compatibility with electrophoretic coatings, JR-720 is the trusted choice for precision seam sealing.

Why Choose Seam Sealant?

Durable Seam Protection

Forms a flexible sealing layer after heat curing to prevent water, corrosion and dust penetration into vehicle joints.

Heat-Curing Performance

Cures at temperatures above 140°C, creating a durable protective seal for automotive manufacturing processes.

Excellent Metal Adhesion

Provides reliable adhesion to oiled steel and galvanized steel surfaces, supporting automotive body applications.

Paint System Compatibility

Compatible with common filler and topcoat systems without affecting coating performance.

Flexible Anti-Vibration Protection

Offers good elongation and flexibility to maintain sealing performance under vehicle vibration and movement.

Manual & Automated Application

Excellent thixotropic properties allow both manual application and robotic dispensing for production efficiency.

Applications

Vehicle Body Weld Seam Sealing

Automotive Underbody Protection

Rocker Panels & Wheel Arches

Truck & Cargo Box Sealing

Need the Right Solution for Your Project?

Contact our technical team for product recommendations, samples, customization support and professional solutions tailored to your application requirements.

Property	Value
Material Base	PVC Plastisol
Curing Method	Heat Curing
Temperature Requirement	Above 140°C
Adhesion	Steel / Galvanized Steel
Application Process	Manual / Robot Dispensing
Joint Type	Butt & Overlap Joints
Vehicle Application	Body, Underbody, Rocker Panels, Wheel Arches

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