3M 08370 - MSP Seam Sealer (Grey, 310mL)

3M 08370 MSP Seam Sealer (Grey, 310 mL) is a professional-grade moisture-curing seam sealer formulated with Modified Silane Polymer (MSP) technology for automotive collision repair and refinishing applications. This one-component formula provides durable adhesion and long-lasting flexibility to help protect panel joints from moisture intrusion and corrosion.

Designed for use on properly prepared surfaces, MSP technology offers strong bonding performance and paintability once cured. The grey color makes it suitable for OEM-style seam replication in applications where a factory grey seam appearance is required. The 310 mL cartridge fits standard caulking-style applicator guns and is ideal for sealing door seams, trunk areas, floor pans, and structural body joints in body shop environments.

Key Features

• 310 mL Cartridge: Compatible with standard caulking-style applicator guns
• MSP (Modified Silane Polymer) Technology: Durable, flexible sealing performance
• Grey Color: Ideal for OEM-style seam appearance
• Corrosion Protection: Helps seal joints against moisture intrusion
• Paintable After Cure: Compatible with automotive refinishing processes
• Professional Grade: Trusted in automotive collision repair facilities