SEM 39777 Dual-Mix High-Build Self-Leveling 2-Component Seam Sealer, Gray, 7 oz. Cartridge

SEM 39777 Dual-Mix High-Build Self-Leveling 2-Component Seam Sealer, Gray, 7 oz. Cartridge

• SEM 39777 Dual-Mix High-Build Self-Leveling Seam Sealer is a two-component controlled-flow epoxy designed for automotive roof seams, drip rails, trunk seams, and other non-flexing body joints. The gray liquid formula can be applied over compatible bare metal, OEM finishes, epoxy primers, and direct-to-metal urethane primers. It remains permanently flexible, resists shrinking and cracking, and can be painted after 15 minutes at 70 F.
• Features:
  • High-build, self-leveling formula supports controlled application on compatible automotive seams.
  • Designed for roof seams, drip rails, trunk seams, and other non-flexing body joints.
  • Applies directly to compatible bare metal, OEM finishes, epoxy primers, and DTM urethane primers.
  • Paintable after 15 minutes at 70 F to support efficient refinishing workflows.
  • Permanently flexible formula will not shrink, harden, or crack under specified use conditions.
  • OEM recommended for applicable collision repair and automotive refinishing procedures.
• Compatible Applications:
  • Automotive Roof Seams
  • Drip Rails
  • Trunk Seams
  • Bare Metal on Non-Flexing Roof Skins
  • OEM Finishes
  • Epoxy Primers and DTM Urethane Primers
• Specifications:
  • Manufacturer: SEM
  • Part Number: 39777
  • MPN: 39777
  • UPC: 646786397776
  • Brand: Dual-Mix
  • Product Type: High-Build Self-Leveling 2-Component Seam Sealer
  • Form: Liquid
  • Color: Gray
  • Container Type: Cartridge
  • Container Size: 7 oz.
  • Working Time: 10 Minutes at 70 F
  • Set Time: 15 Minutes at 70 F
  • Paintable Time: 15 Minutes at 70 F
  • Cure Time: 1 Hour at 70 F
  • Flash Point: 249 C
  • Applicable Materials: Bare Metal, OEM Finish, Epoxy Primer, and DTM Urethane Primer
  • Approvals and Warnings: OEM Approved, GHS07, GHS08, OSHA HCS Hazard, and California Proposition 65 Warning
• This item is also often referred to as high-build seam sealer, self-leveling automotive seam sealer, two-component epoxy seam sealer, gray body seam sealer, and SEM Dual-Mix seam sealer.

SEM manufactures professional automotive repair and refinishing products for collision centers, body shops, and industrial users. Its product line includes seam sealers, adhesives, coatings, primers, plastic repair materials, and surface preparation products designed for professional repair processes.

Q: Where can SEM 39777 be applied?
A: It is designed for roof seams, drip rails, trunk seams, and compatible non-flexing automotive body joints.

Q: What surfaces are compatible with this seam sealer?
A: It can be applied to compatible bare metal, OEM finishes, epoxy primers, and DTM urethane primers.

Q: How soon can SEM 39777 be painted?
A: It can be painted after approximately 15 minutes at 70 F.

Q: How long does the seam sealer take to cure?
A: The stated cure time is approximately 1 hour at 70 F.