3M Adhesive Sealant 540

3M Adhesive Sealant 540 Datasheet
  • Description for 3M Adhesive Sealant 540

    Polyurethane • Moisture cures rapidly to flexible seal/bond for many plastics, metal, wood, and more • 250 psi tensile strength

    *See Terms of Use Below

    Application Type Seal, Adhesive
    1 Part or 2 Part 1 Part
    Material Form Medium paste
    Substrate Acrylic, Metal, Nylon 66, ABS, PolyEthylene, Polycarbonate, Polypropylene, PVC, EPDM, Cold rolled Steel, Stainless Steel, Fir, Fiberglass , FRP, Plastic, Steel, Wood
    Industry Wire, Trailers, Trains, Transportaion, Trucks
    Manufacturer 3M
    Chemistry Polyurethane, Methyl ethyl ketone (MEK)
    Application Method Spatula, Trowel
    Cure Method Moisture
    Cure Temperature (°C) 23
    Cure Time (min) 1,440, Fast
    Viscosity (cPs) Non-sag
    Color Black, Gray, White
    High Temperature Resistance (°C) 90
    Low Temperature Resistance (°C) -40
  • Technical Data for 3M Adhesive Sealant 540

    Overview
    Specifications
    Cure Specs
    Application Temperature (°F) 41 to 95
    Cure Temperature (°C) 23 Test Method
    Cure Time (min) 1,440, Fast Test Method
    Viscosity (cPs) Non-sag
    Tack Free Time (min) 60 to 90 Test Method
    Bond Strength
    Tensile Strength (psi) High, 300 Test Method
    Material Resistance
    Non-Corrosive Corrosion
    UV Resistance Good
    High Temperature Resistance (°C) 90
    Low Temperature Resistance (°C) -40
    Moisture/Humidity Resistance Excellent water resistance
    Hardness
    Shore A Hardness 40 Test Method
    Elongation (%) >600 Test Method
    Flexibility Flexible, Permanent elastic
    Modulus (psi) Low, 125 Test Method
    Other Properties
    Specific Gravity 1.170
    Flash Point (°F) 136.4
    % Solids (%) >90
    Business Information
    Shelf Life Details Storage: 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).;Shelf Life: When stored at recommended conditions, the shelf life is 6 months from date of shipment from 3M., 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 12 months from the date of manufacture. For 5 and 55 gallon containers, the shelf life is 6 months from date of manufacture.
    Shelf Life Temperature (°F) <77 Room Temperature, <77 Room Temperature
    Shelf Life Type From date of manufacture, From date of manufacture
    Shelf Life (mon) 12, 6
  • Best Practices for 3M Adhesive Sealant 540

    *See Terms of Use Below

    1. 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 contaminates 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.

    2. 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.

    3. Clean-Up

      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.

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Cure Temperature Test Methods
Cure Temperature Cure Time Test Method
23°C Rate of Cure @ 73°F and 50% Relative Humidity, 1/8" (3 mm) per 24 hour
Cure Time Test Methods
Cure Time Test Method
1,440 min Rate of Cure @ 73°F and 50% Relative Humidity, 1/8" (3 mm) per 24 hour
Fast
Tack Free Time Test Methods
Tack Free Time Tack Free Temperature Test Method
60 to 90 min 23°C Tack-Free Time @ 73°F and 50% Relative Humidity
Tensile Strength Test Methods
Tensile Strength Test Method
High
300 psi ASTM D412
Elongation Test Methods
Elongation Test Method
>600 % ASTM D412
Modulus Test Methods
Modulus Test Method
Low Modulus Test Method
125 psi ASTM D412, 100% modulus
Shore A Hardness Test Methods
Shore A Hardness Shore Hardness Test Method
40 ASTM C661
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