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Urethane Seam Sealer is a premium one-part moisture-curing
310 mL Metal Cartridge
Container
310mL Aluminum Cartridge
Base
Moisture Curing Urethane
Density lbs./Gallon (Approx.)
9.8
White (08368)
Flash Point
Solids Content (Approx.)
95%
Consistency
Viscous Paste
Service Temperature
Solvent
Minimal Xylene
Urethane Seam Sealer
08362 • 08365 • 08367 • 08368
Technical Data June 2020
3M Part Numbers 3M Part Descriptor
08362 3M™ Urethane Seam Sealer (gray)
08365 3M™ Urethane Seam Sealer (beige)
08367 3M™ Urethane Seam Sealer (black)
08368 3M™ Urethane Seam Sealer (white)
Product Description
Features
Typical Physical Properties
3M™
automotive seam sealer designed for application to exterior and interior body
seams. 3M™ Urethane Seam Sealer may be applied to properly prepared
primer/paint coated surfaces or properly prepared bare metal surfaces. 3M™
Urethane Seam Sealer also functions as a weld through sealer when used in
conjunction with squeeze type resistance spot welding (STRSW) operations.
3M™ Urethane Seam Sealer may be painted with common automotive type
paint systems (water and solvent borne systems) in thirty minutes and up to
twenty four hours later (scuff after 24 hours).
Moisture Cure Technology
Weld Through Capability
Direct to Metal Application
NOTE: The following technical information and data should be considered representative or typical
only and should not be used for specification purposes.
Color
Gray (08362), Beige (08365), Black (08367),
>200°F (93.3°C) (closed cup method)
-20°F to 180°F (-28°C to 82°C)
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3M™ Urethane Seam Sealer
Cold Temperature Resistance at -20°F (-29°C)
Remains flexible
Heat Resistance: 8 Weeks at 200°F (93°C)
Remains flexible
Adhesion: Primed Metal: Excellent
Cohesive failure
Bare Metal: Excellent
Cohesive failure
Tensile Strength: Good
Flexibility: Excellent
600% Elongation
08362 • 08365 • 08362 • 08365
Product Uses
General sealing of interior and exterior automotive seams including floor pans,
hem flanges, frame rails, rear body panels, aprons and other seams including
those requiring weld through applications using squeeze type resistance spot
welding.
Use with the following accessories:
• 3M™ Single Component Cartridge Applicator – Pneumatic (PN 08990)
• 3M™ Professional Caulk Applicator – Manual (PN 08993)
• 3M™ Threaded Cartridge Nozzles (PN 08187 box/50)
For professional use only. Not intended for retail sale.
Performance Properties
NOTE: The following technical information and data should be considered representative or typical
only and should not be used for specification purposes.
Directions for Use PRIMER OR PAINT SURFACE
1. Clean the surface with a VOC compliant surface cleaner to remove any
contaminates.
2. Scuff the surface using a Scotch-Brite™ Scuff Pad or grade P180 to P320
abrasive.
3. Blow off and re-clean the surface to ensure proper adhesion.
4. Perforate the seal at the cartridge outlet and install the nozzle. Use the pull
tab to remove the metal seal at the cartridge base. Install the cartridge in a
suitable caulking gun (see reference in “Product Uses” section).
5. Cut nozzle to provide desired bead size.
6. Apply seam sealer and tool (if necessary) to desired finished appearance.
(230 psi)
7. Allow 30 minutes before painting, after 24 hours scuff with a 3M™
Scotch-Brite scuff pad.
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3M™ Urethane Seam Sealer
08362 • 08365 • 08362 • 08365
Directions for Use, cont.
WELD THROUGH
NOTE: For weld through operations (prior to welding the panel(s) make test welds on scrap parts
to assure proper welding machine settings).
1. Remove coatings on all sides of weld flanges.
2. Apply seam sealer to all bare metal between weld flanges (brush to cover all
bare metal).
3. Mate parts together and clamp in place.
4. Be sure to use a shunt clamp and start welds near the clamp.
BARE METAL
1. Clean the surface with a VOC compliant surface cleaner to remove any
contaminates.
2. Grind any weld nuggets (grade 50 to 80) or scuff spot weld locations using a
non-woven coarse grade surface conditioning disc or belt.
3. Blow off and re-clean the surface to ensure proper adhesion.
4. Perforate the seal at the cartridge outlet and install the nozzle. Use the pull
tab to remove the metal seal at the cartridge base. Install the cartridge in a
suitable caulking gun (see reference in “Product Uses” section).
Applications
Storage and Handling
Precautionary Information
5. Cut nozzle to provide desired bead size.
6. Apply seam sealer and tool (if necessary) to desired finished appearance.
7. Allow 30 minutes before painting, after 24 hours scuff with a 3M™
Scotch-Brite scuff pad.
NOTE: 3M™ Urethane Seam Sealer may be applied to properly prepared bare metal and/or
primer/paint coated surfaces, and can be used as a “weld through” sealer when squeeze type
resistance spot welding equipment is used.
Acid etch primer is not recommended to be used in direct contact
with any 3M seam sealer. Residual acid can weaken the bond.
Store at room temperature. Rotate stock on a “first-in-first-out” basis. When
-ventilated area.
Before using this product, please reference Product Label and/or Safety Data Sheet for Health
and Safety Information. Note: Laws controlling the acceptable amounts of Volatile Organic
Compounds (VOCs) vary by state, and in some cases by locality. For surface preparation and
clean-up activities, consult federal, state and local regulations regarding use of products
containing VOCs in your area.
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3M™ Urethane Seam Sealer
MITED
place use. Unless specifically stated otherwise on the
orting, or other uses not described in the applicable product packaging or literature),
product use notice. Misuse of 3M industrial and occupational products may result in injury, sickness,
08362 • 08365 • 08362 • 08365
Technical Information
Product Selection and Use
Warranty, Limited Remedy
and Disclaimer
The technical information, guidance, and other statements contained in this document or
otherwise provided by 3M are based upon records, tests, or experience that 3M believes to be
reliable, but the accuracy, completeness, and representative nature of such information is not
guaranteed. Such information is intended for people with knowledge and technical skills
sufficient to assess and apply their own informed judgment to the information. No license under
any 3M or third party intellectual property rights is granted or implied with this information.
Many factors beyond 3M’s control and uniquely within user’s knowledge and control can affect the
use and performance of a 3M product in a particular application. As a result, customer is solely
responsible for evaluating the product and determining whether it is appropriate and suitable for
customer’s application, including conducting a workplace hazard assessment and reviewing all
applicable regulations and standards (e.g., OSHA, ANSI, etc.). Failure to properly evaluate, select,
and use a 3M product in accordance with all applicable instructions and with appropriate safety
equipment, or to meet all applicable safety regulations, may result in injury, sickness, death, and/or
harm to property.
Unless a different warranty is specifically stated on the applicable 3M product packaging or
product literature (in which case such warranty governs), 3M warrants that each 3M product
meets the applicable 3M product specification at the time 3M ships the product. 3M MAKES NO
OTHER WARRANTIES OR CONDITIONS, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LI
TO, ANY IMPLIED WARRANTY OR CONDITION OF MERCHANTABILITY, FITNESS FOR A
PARTICULAR PURPOSE, OR ARISING OUT OF A COURSE OF DEALING, CUSTOM, OR USAGE
OF TRADE. If a 3M product does not conform to this warranty, then the sole and exclusive
remedy is, at 3M’s option, replacement or repair of the 3M product or refund of the purchase
price. Warranty claims must be made within one (1) year from the date of 3M’s shipment.
Limitation of Liability
Disclaimer
Except for the limited remedy stated above, and except to the extent prohibited by applicable law,
3M will not be liable for any loss or damage arising from or related to the 3M product, whether
direct, indirect, special, incidental, or consequential (including, but not limited to, lost profits or
business opportunity), regardless of the legal or equitable theory asserted, including, but not limited
to, warranty, contract, negligence, or strict liability.
3M industrial and occupational products are intended, labeled, and packaged for sale to trained
industrial and occupational customers for work
applicable product packaging or literature, these products are not intended, labeled, or packaged
for sale to or use by consumers (e.g., for home, personal, primary or secondary school,
recreational/sp
and must be selected and used in compliance with applicable health and safety regulations and
standards (e.g., U.S. OSHA, ANSI), as well as all product literature, user instructions, warnings, and
other limitations, and the user must take any action required under any recall, field action or other
death, or property damage. For help with product selection and use, consult your on-site safety
professional, industrial hygienist, or other subject matter expert. For additional product information,
visit www.3M.com.[1]
Automotive Aftermarket Division
3M Center, Building 0223-6-S-07
St. Paul, MN 55144-1000
1-877-666-2277 (1-877-MMM-CARS)
3MCollsion.com
3M and Scotch-Brite are trademarks of 3M Company.
Printed in U.S.A. © 3M 2020 All rights reserved (06/20)
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