CONTROLLED FLOW SEAM SEALER - 3M Automotive

The 3M Automotive 8329 Controlled Flow Seam Sealer is an advanced two-part urethane solution engineered for professional automotive and industrial repair. This specialized sealer enables technicians to achieve precise, factory-quality seam replication in collision, restoration, and fleet maintenance environments. Its controlled flow characteristics promote an efficient workflow by minimizing rework and extensive clean-up.

Key Features

• Controlled Flow Formula: Designed with a low-slump, non-sag consistency, this material ensures neat and accurate bead placement, even on vertical or overhead surfaces and intricate body seams. It flows approximately 1 to 2 inches on non-level surfaces, preventing excessive waste and maintaining uniform film thickness.
• Robust Adhesion: Provides strong and lasting bonds to properly prepared automotive metals, 2K urethane, 2K epoxy primer, and OEM finishes, ensuring durable and long-lasting sealing performance.
• Flexible & Durable: The urethane technology allows the sealer to remain elastic after curing, enabling it to withstand torsional stress, vehicle body flex, vibrations, and extreme temperature changes without cracking or shrinking. The formula contains no solvents, preventing shrinking or cracking.
• Paintable Finish: Compatible with most automotive refinish systems, this sealer can be painted in approximately 40 minutes, allowing for seamless integration and restoration of the original factory appearance in visible repair areas.
• Fast Cure Time: This sealant fully cures in just 2 hours, making it ideal for high-speed repair results.

Applications

The 3M Automotive 8329 Controlled Flow Seam Sealer is suitable for professional body shops, fleet maintenance facilities, and restoration projects. Common applications include:

• Sealing body panel seams and joints on various vehicles, including cars, light trucks, and commercial vehicles.
• Applying controlled beads in critical areas such as trunk gutters, floor pans, rocker panels, and door skin seams where precise shape is essential. It is particularly effective for "roof ditch" and "trunk rain gutter" applications requiring a flow-grade sealer.
• Replicating original factory seam appearance during collision repair or rust repair.
• Creating effective seals to help prevent water, dust, air, and exhaust fumes from entering vehicle cabins or cargo areas.

Specifications

• Manufacturer: 3M Automotive
• Model number: 8329
• Product type: Controlled Flow Seam Sealer
• Weight: 1.2 lb (404 g)
• Dimensions: 12 x 9.6 x 5.3 in (200 mL cartridge)