Create Tight, Long-Lasting Seals
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.
Fill in Gaps with Confidence
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. Note that the sealer should be top coated when exposed to ultra violet rays.
Excellent Performance in High Heat and Humidity
While some seam sealers require cure time in a completely dry environment, our 3M™ Urethane Seam Sealer is moisture-curing so it provides a reliable seal regardless of moisture or humidity in the air. It can be painted after 30-45 minutes.
Rigid or Flex Pack Options
This sealer comes in either a flexible foil pack or rigid metal cartridge. Application of the cartridge sealer requires the use of a 3M™ Single Component Cartridge Applicator Gun – pneumatic (08990) or 3M™ Professional Caulking Gun (08993), and 3M™ Threaded Cartridge Nozzles (08187). Foil packs are designed for use with 3M™ Flexible Package Applicator Gun – Pneumatic (08399) or 3M™ Flex Pack Applicator (08398) these include one applicator nozzle, additional nozzles may be acquired as PN (08188).
3M Science Meets the Needs of Automotive Professionals
3M™ Urethane Seam Sealer was formulated for general repairs that require long-lasting hold, easy curing, and appearance matching. 3M™ Urethane Seam Sealer is ideal for lasting seam sealing protection on many different surfaces, including bare metal, and allows technicians to expertly recreate OEM appearances. This expert formula represents another way that 3M applies scientific knowledge and ingenuity to the automotive industry.

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Dynabrade 14010 Dynafile Abrasive Belt Tool Versatility Kit
3M 20868, PSA Cloth Disc 348D, P120 X-weight, 8 in x NH, Die 800L, 7010326519
3M 01745, Imperial Hookit Disc 740I, 8 in, 36E, 7010364829, 25 discs per carton
3M 12787, Wetordry Cloth Disc 281W, 8 in x NH, P600, 7010363748
3M 00525, Green Corps Hookit Disc, 8 in, 36, 7000120340, 25 discs per carton
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3M 36414, Blue Net Disc, 180, 8 in, 7100253872, 25 Discs/Carton
ACS Diamond Cloth Belt, CX1250 3" X 30" 75U
Dynabrade 78103 2" Dia. x 36 Grit Premium Ceramic Non-Vacuum DynaCut Locking-Type Disc, 25/pack
3M 00521, Green Corps Hookit Disc, 8 in, 80, 7000120338, 25 discs per carton
3M 31647, Cubitron II Net Disc, 320+, 8 in, 7100248703, 25 Discs/Carton
3M 13372, Scotch-Brite Star, 3 in A CRS LS, 7000120967
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3M 01853, Imperial Hookit Dust-Free Disc 740I, 8 in, 36E, 7010307752, 25 discs per carton
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3M 29825, Sanding Screen, 60 Grit, 20 in x NH, 7100160253
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Dynabrade 95843 Dynabrade Air Lube 10W/NR, 1 Gallon 
