English
June, 2023Last Revision Date:
March, 2021Supersedes:
Technical Data Sheet
3M Polyurethane Sealant 540
Product Description
3M 500-Series Polyurethane Construction Sealant, Polyurethane Sealant and Polyurethane Adhesive Sealant products are one component, moisture curing products
which form permanent elastic bonds. They bond to a wide variety of materials including plastics, metals, fiberglass, and wood. They are formulated to have a wide variety of
Shore A hardness, open times, and performance parameters to meet many application needs.
Product Features
Technical Information Note
The following technical information and data should be considered representative or typical only and should not be used for specification purposes.
Typical Uncured Physical Properties
Property Values Additional Information
Consistency Medium Paste
Typical Mixed Physical Properties
Property Values Additional Information
Tack Free Time 60 to 90 min View
Test Condition: Room Temperature
Rate of Cure 1 to 8 in per 24 hr View
Test Condition: Room Temperature
Rate of Cure 3 mm per 24 hr View
Test Condition: Room Temperature
Typical Cured Characteristics
Property Values Additional Information
Shore A Hardness 40 View
Test Method: ASTM C661
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Modulus at 100% Elongation 0.9 MPa View
Test Method: ASTM D412
Modulus at 100% Elongation 125 lb/in View
Test Method: ASTM D412
Typical Performance Characteristics
Property Values Additional Information
Tensile Strength 2.1 MPa View
Test Method: ASTM D412
Tensile Strength 300 lb/in View
Test Method: ASTM D412
Elongation at Break >600 % View
Test Method: ASTM D412
Long Term Temp C 90 C View
Test Condition: Long Term (day, weeks)
Minimum Long Term Temperature Resistance -40 C View
Test Condition: Long Term (day, weeks)
Long Term Temp F 194 F View
Test Condition: Long Term (day, weeks)
Minimum Long Term Temperature Resistance -40 F View
Test Condition: Long Term (day, weeks)
Application Temperature 5 to 35 C
Application Temperature 40 to 95 F
Typical Physical Properties
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Property Values Additional Information
VOC 53.7 g/L
VOC 0.448 lb/gal
Approximate Coverage 38 lineal m View
Notes: 10.5 oz. [310 mm Cartridge]; 1/8 in (3 mm) bead
Approximate Coverage 126 lineal ft View
Notes: 10.5 oz. [310 mm Cartridge]; 1/8 in (3 mm) bead
Specific Gravity 1.17
Sagging (ISO 7390) None
Water and salt spray resistance Excellent
Compatibility with paints Water based: yes
Solvent based: test beforehand
Product Certifications and Listings
Typical Environmental Performance
Long term exposure to temperatures greater than 194 F (90 C) will decrease tensile strength over time. Do not use these products in applications where the temperatures
will continuously exceed 194 F (90 C).
Storage and Shelf Life
Polyurethane sealants and adhesive sealants must be stored in a controlled environment to maximize shelf life. Store the products in the original unopened containers below
77 F (25C).
When stored at recommended conditions, the shelf life of cartridges and sausage packs is 15 months from the date of manufacture. For 5 and 55 gallon containers, the shelf
life is 6 months from date of manufacture.
Industry Specifications
NFPA 130 test report for details (ASTM E662)
NFPA 130 test report for details (BSS 7239)
Automotive Disclaimer
Select Automotive Applications: This product is an industrial product and has not been designed or tested for use in certain automotive applications, such as automotive
electric powertrain battery or high voltage applications, which may require the product to be manufactured in a IATF certified facility, meet a Ppk of 1.33 for all properties,
undergo an automotive production part approval process (PPAP), or fully adhere to automotive design or quality system requirements (e.g., IATF 16949 or VDA 6.3).
Customer assumes all responsibility and risk if customer chooses to use this product in these applications.
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Bottom Matter
3M
Industrial Adhesives and Tapes Division
3M Center, Building 225-3S-06
St. Paul, MN 55144-1000
800-362-3550
Trademarks
3M and Scotch-Brite are trademarks of 3M Company.
Handling/Application Information
Application Examples
Application Equipment
Cartridge and Sausage Pack:
A variety of applicators are available. Please contact your sales rep for assistance in selecting an applicator.
Bulk Dispensing:
A 38:1 ratio dual action piston pump with a ram is suggested. Actual equipment should be designed for your application based on the volume required. Please contact your
sales rep or the technical service group to suggest equipment manufacturers (Graco: 1-877-844-7226 or www.graco.com).
Directions for Use
Surface Preparation:
Surfaces to be sealed or bonded should be clean and dry. Surfaces should be free from grease, mold release, oil, water/condensation, and other contaminants that may
affect the adhesion of the sealant. Abrading with 180 to 220 grit abrasive followed by a solvent wipe will improve the bond strength. Suitable solvents include 3M
Adhesive Remover or methyl ethyl ketone (MEK).*
*When using solvents, use in a well ventilated area. Extinguish all sources of ignition in the work area and observe product directions for use and precautionary measures.
Refer to product label and MSDS for further precautions. Always pre-test solvent to ensure it is compatible with substrates.
Local and federal air quality regulations may regulate or prohibit the use of these products or surface preparation and cleanup materials. Consult local and federal air quality
regulations before using these products.
Note: Alcohol will interfere with the curing process and extra care must be taken when using alcohol as a cleaning solvent to prevent any contact with the sealant.
Primer:
Use of a primer is an extra step and cost and will depend on substrates and the final end use. Using primer can improve the corrosion resistance of certain metals as well as
improve the durability of the bond when exposed to high humidity conditions. For most applications, high strength bonds on metal can be achieved without the use of a
primer. Pre-testing for adhesion is suggested to determine if a primer is needed. Contact your 3M Technical Service representative for primer recommendation and
application advice.
Application:
Loading the applicator gun: make sure the applicator is set up with correct plunger attachment for cartridge or sausage pack.
Cartridge: Puncture seal in nozzle and remove the pull-tab seal at the bottom of the cartridge. Load into applicator and fix retaining ring (if applicable). Assemble the nozzle
(if applicable) and cut to desired size and shape.
Sausage Pack: Make a 1″ slit close to the crimp on one end of the sausage pack. Load the sausage pack into the applicator barrel (slit side out). Place the rounded end of the
supplied sausage nozzle onto the slit end of the sausage package and fix with retaining ring. Cut nozzle to desired size and shape.
Product should be used within 24 hours after seal is punctured. Dispense product with the nozzle tip in contact with the substrate to insure good gap filling. Bonding must
occur within the first 50% of published skin time
Do not apply polyurethane sealants and adhesive sealants on frozen nor wet surfaces. Do not apply over silicone nor in the presence of curing silicone nor hybrid products.
Avoid contact with alcohol and solvents during curing. Sealant can be tooled immediately after applying to give desired appearance.
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Cleanup:
While sealant is still soft, cleaning can be done with the same solvents used for surface preparation. Avoid cleaning with alcohol as it will interfere with the curing process.
If sealant is already cured, removal is done mechanically with razor knife, piano wire, sanding or 3M Scotch-Brite Molding Adhesive and Stripe Removal Disc. This disc
is available from 3M Automotive Aftermarket Division.
References
Property Values
3m.com Product Page https://www.3m.com/3M/en_US/p/d/b40066985/
Safety Data Sheet SDS https://www.3m.com/3M/en_US/company-us/SDS-search/results/?
gsaAction=msdsSRA&msdsLocale=en_US&co=ptn&q=540
Family Group
Link Tags:
525 540 550FC 551 560
Products Long Term Temp C Long Term Temp F Rate of Cure
Minimum Long Term
Temperature Resistance
Color
525 N/A N/A N/A N/A N/A
560 N/A N/A N/A N/A N/A
540 90 C 194 F 3 mm per 24 hr -40 C N/A
551 90 C 194 F N/A -40 C White
550FC 90 C 194 F 4 mm per 24 hr -40 C N/A
ISO Statement
This Industrial Adhesives and Tapes Division product was manufactured under a 3M quality system registered to ISO 9001 standards.
Precautionary Information
Refer to Product Label and Material Safety Data Sheet for health and safety information before using this product. For additional health and safety information, call 1-800-
364-3577 or (651) 737-6501.
Information
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.
Technical 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 and appropriate safety products, or to meet all applicable safety regulations, may result in injury, sickness, death, and/or harm to
property.
Product Selection and Use:
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 LIMITED 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, Limited Remedy, and Disclaimer:
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warranty, then the sole and exclusive remedy is, at 3M s option, replacement of the 3M product or refund of the purchase price.
Except for the limited remedy stated above, and except to the extent prohibited by 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.
Limitation of Liability:
3M industrial and occupational products are intended, labeled, and packaged for sale to trained industrial and occupational customers for workplace use.
Unless specifically stated otherwise on the 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/sporting, or other uses not described in the applicable product packaging or literature), 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 limitations, and the user must take any action required under any recall, field action or other product use notice. Misuse of 3M industrial and occupational
products may result in injury, sickness, or death. 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.
Disclaimer:
Please recycle. 3M 2014
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