3M 08365 Urethane Medium Bodied Seam Sealer (Beige, 310mL) is a professional-grade automotive seam sealer engineered for structural and cosmetic seam sealing in collision repair. Heavy-bodied, non-sag formula maintains its shape on vertical and overhead seams — door jambs, pillar seams, wheel well lips, and any joint requiring a bead that stays where placed during cure.
Urethane chemistry provides superior long-term adhesion to bare metal, e-coated, primed, and painted substrates with the flexibility to resist cracking from panel vibration and thermal cycling throughout the vehicle’s service life. Beige-colored formula matches common OEM seam seal color profiles for a factory-appearance repair. Paintable after proper flash time — finish with any topcoat system.
- Type: Urethane Medium Bodied Seam Sealer
- Color: Beige
- Volume: 310mL
- Application: Cartridge applicator gun
- Substrates: Bare metal, e-coat, primer, painted surfaces
- Paintable: Yes, after flash time
- Country of Origin: USA
- Part Number: 08365
Part of 3M’s comprehensive seam sealer line covering every seam type and application requirement. Match the flow type to the seam orientation — self-leveling for horizontal, heavy-bodied for vertical and overhead. Sold individually.
