3M 08364 - Urethane Seam Sealer (Beige, 310mL)

3M 08364 Urethane Seam Sealer (Beige, 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 durable adhesion and long-lasting flexibility, helping seal panel joints while protecting against moisture intrusion and corrosion.

Designed for use on properly prepared and primed surfaces, the sealer cures to a flexible finish that accommodates body panel movement and vibration. The beige color allows for OEM-style seam replication in applications where a tan or factory-toned appearance is required. The 310 mL cartridge fits standard caulking-style applicator guns and is suitable for door seams, trunk areas, floor pans, quarter panels, and structural body joints.

Key Features

• 310 mL Cartridge: Compatible with standard caulking-style applicator guns
• Moisture-Curing Urethane Formula: Strong adhesion with flexible performance after cure
• Beige Color: Ideal for OEM-style seam appearance in select 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 body shop environments