3M 08578 Strip-Calk Seam Sealer (60 strips) is a pre-formed butyl rubber strip sealer for sealing automotive body panel seams, joints, and transitions during assembly and collision repair. Each strip is pre-cut to a consistent size and ready to press into seams — no gun, no mixing, no dispensing equipment required. The butyl rubber stays pliable indefinitely after application, permanently sealing the seam against moisture and road noise.
- Pack: 60 strips
- Material: Butyl Rubber
- Application: Panel seams, joint sealing, floor pan seams, hem flanges
- Method: Press-in-place — no gun required
- Paintable: Yes
- Part Number: 08578
