3M 08367 - Urethane Seam Sealer (Black, 310mL)

3M 08367 Urethane Seam Sealer (Black, 310 mL) is a professional-grade moisture-curing urethane seam sealer designed for automotive collision repair and refinishing applications. This one-component urethane formula provides strong adhesion and long-lasting flexibility, helping seal panel joints while protecting against moisture intrusion and corrosion.

Engineered for use on properly prepared and primed surfaces, the sealer cures to a flexible finish that accommodates panel movement and vibration. The black color makes it ideal for applications where a dark OEM-style seam appearance is required, including underbody areas and visible factory-style seams. The 310 mL cartridge fits standard caulking-style applicator guns for convenient application in body shop environments.

Key Features

• 310 mL Cartridge: Compatible with standard caulking-style applicator guns
• Moisture-Curing Urethane Formula: Durable adhesion with flexible performance after cure
• Black Color: Ideal for OEM-style dark seam applications
• Corrosion Protection: Helps seal joints against moisture intrusion
• Flexible After Cure: Accommodates panel movement and vibration
• Professional Grade: Trusted in automotive collision repair and restoration facilities