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3M™ 08364 1-Component Seam Sealer, 310 mL Flex-Pack, Paste, Beige, 24 hr Curing

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Product Description

Our 3M™ urethane seam sealer is a high solids seam sealer ideal for sealing automotive and RV seams and joints. It adheres well to bare metal, primed metal and painted surfaces and if desired can be smoothed to a featheredge and/or brushed. Tack-free and paintable after 30 to 45 min, this urethane formula is permanently flexible and offers superior performance to solvent-based sealers. 3M™ urethane seam sealer is an excellent choice when sealing interior or exterior seams to help prevent the intrusion of water, dust and air, aiding in providing corrosion-resistance at these locations. Choose this seam sealer for high quality sealing of seams and joints on primed metal or painted surfaces and even on bare metal. It applies easily and is formulated for long-lasting support to the seam without shrinking, cracking or causing unpleasant odors. With its thick consistency, our 3M™ urethane seam sealer is an excellent gap sealer and you can feel confident using this sealer to fill large voids between parts where they occur. Designed to be used over epoxy or urethane based primers, the sealer comes in several colors to enable color matching.


  • High quality, single-component formula adheres well to bare metal, primed metal and painted surfaces
  • Moisture curing property provides excellent performance in high heat and humidity environments
  • Non-shrinking, non-cracking, low/no odor formula remains flexible and offers superior results to solvent-based sealers
  • Paintable after 30 to 45 min
  • Thick consistency is able to fill large voids
  • Can be smoothed to a featheredge or brushed
  • Recommended for use with 3M™ single-component cartridge applicator gun PN08990 or 3M™ professional caulking gun PN08993


More Information
Part No. 8364
Product Line MMM
MFR Model 8364
Standard/Approvals California Pro65 Warning: Cancer and Reproductive Harm
Application For general-purpose automotive seams, including door skins, rocker panels, rear body panels, trunk seams, floor pans and more
Manufacturer 3M Products
Alternate Part Number-1 60455030910
UPC 051135083642
Brand 3M™
Part Status A
Applicable Materials Bare Metal, Painted Surfaces, Primed Metal
Composition 15 to 40% Urethane Polymer, 10 to 30% PVC Polymer, 10 to 30% Sulfonic Acids, C10-18-Alkane, pH Esters, 5 to 10% Xylene, 1 to 5% Calcium Oxide, 1 to 5% Ethylbenzene, 1 to 5% Hydrotreated Light Petroleum Distillates, 1 to 5% Titanium Dioxide, 0.1 to 1 P,P'-Methylenebis(Phenyl Isocyanate)
Application Time 10 to 20 min
Paintable (Y/N) Yes
Specific Gravity 1.17
Sprayable (Y/N) Yes
Base Type Moisture-Curing Urethane
Component 1K
Color Beige
Container Size (mL) 310
Flash Point 92 deg F
Container Type Flex-Pack
Form Paste
Temperature Rating (deg F) -25 to 180
Type 1-Component
Curing Time 24 hr


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