3M 08329 Polyurethane Medium Bodied Seam Sealer (200mL) 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.
Polyurethane 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. Available in multiple colors to match OEM seam seal appearance on specific vehicle makes and models. Paintable after proper flash time — finish with any topcoat system.
- Type: Polyurethane Medium Bodied Seam Sealer
- Volume: 200mL
- Application: Cartridge applicator gun
- Substrates: Bare metal, e-coat, primer, painted surfaces
- Paintable: Yes, after flash time
- Country of Origin: USA
- Part Number: 08329
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.
