3M Scotch-Weld General Purpose Instant Adhesives EC40 Datasheet 3M Scotch-Weld General Purpose Instant Adhesives EC40

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  • Description for 3M Scotch-Weld General Purpose Instant Adhesives EC40

    A low viscosity cyanoacrylate that is fast curing. It is recommended for use on assemblies with close-fitting parts and smooth, even surfaces.<br/>

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    Brand Scotch-Weld
    Chemical Resistance Oils, Chemical Resistance: solvents, excellent
    Application Type Bond
    1 Part or 2 Part 1-Part
    Material Form Liquid
    Substrate Aluminum, Metals, Nylon, Most plastics, Rubbers, Steel, Stainless Steel
    Manufacturer 3M
    Chemistry Cyanoacrylate, Ethyl
    Cure Method Moisture
    Gap Fill (in) 0.004
    Cure Time (min) Fast, 1,440
    Viscosity (cPs) Low, 20 to 45
    Color Clear
    High Temperature Resistance (°C) 82
    Low Temperature Resistance (°C) -51
    Key Specifications International Organization for Standardization

  • Technical Data for 3M Scotch-Weld General Purpose Instant Adhesives EC40

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    Overview
    • Chemical Resistance
      • Chemical Resistance - Oils, excellent
      • Chemical Resistance : Relative Solvent Resistance - solvents
    • Application Type
    • 1 Part or 2 Part
      • 1-Part
    • Material Form
      • Liquid
    • Substrate
    • Industry
      • Other - Close-fitting parts and smooth, even surfaces
    • Chemistry
    • Application Method
      • Other - Hand applied
    • Cure Method
      • Moisture / Condensation Cure - Moisture
    • Color
      • Clear / Transparent - Clear
    • Key Specifications
      • International Organization for Standardization
    • Brand
      • Scotch-weld
    Specifications
    Cure Specs
    Gap Fill (in) 0.004
    Cure Time (min) Fast, 1,440 Test Method
    Viscosity (cPs) Low, 20 to 45 Test Method
    Fixture or Handling Strength Time (min) <0.25 Test Method
    Bond Strength
    General Bond Strength (psi) High
    Shear Strength (psi) 2,000, 2,400, 1,700, 1,000, 800, 1,200, 400, 800, 100 Test Method
    Material Resistance
    High Temperature Resistance (°C) 82 Test Method
    Low Temperature Resistance (°C) -51 Test Method
    Other Properties
    Specific Gravity 1.06 (g/ml) Test Method
    Business Information
    Shelf Life Details For short term storage (<30 days), keep adhesive in a cool (60°F to 80°F [16°C to 27°C]), dry place out of direct sunlight. Keep containers tightly covered and free of moisture. Refrigeration (40°F [4°C]) gives optimum long term storage stability., 3M™ Scotch-Weld™ General Purpose Instant Adhesives can be expected to have a shelf life of one year from the date of shipment from 3M when stored under refrigerated conditions.
    Shelf Life Temperature (°F) 61 to 81
    Shelf Life Type From the date of shipment
    Shelf Life (mon) 12

  • Best Practices for 3M Scotch-Weld General Purpose Instant Adhesives EC40

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    1. Surface Preparation

      For optimum strength structural bonds, paint, oxide films, oils, dust, mold release agents, and all other surface contaminants must be completely removed. However, the amount of surface preparation depends on the required bond strength and the environmental aging resistance desired by the user. Typical quick surface preparation would include wiping with a clean solvent (such as isopropyl alcohol), abrading the surface with a clean fine abrasive, and then wiping again with a clean solvent to remove loose particles.

    2. Application

      Ensure that parts are clean, dry, and free from oil and grease., An instant adhesive activator may be required if there are bonding gaps or porous substrate surfaces, if substrates are low surface energy plastics (e.g., polyethylene, polypropylene) or if substrates have acidic surfaces (e.g., paper, leather)., Bond speed is typically very fast so ensure that parts are properly aligned before dispensing., Product is normally hand applied from the bottle. Apply sparingly to one surface and press parts firmly together until handling strength is achieved. As a general rule, as little cyanoacrylate as possible should be used. Over application will result in slower cure speed and lower bond strength.

    3. Curing

      Full bond strength will typically be achieved within a 24 hour cure time., Low humidity or low temperature conditions will slow down the cure rate., After curing, 3M™ Scotch-Weld™ General Purpose Instant Adhesive bonds are suitable for use up to about 180°F (82°C)., Cyanoacrylate bond resistance to most oils and solvents is excellent. Long term humidity, moisture, or water immersion may affect the strength of a cured cyanoacrylate bond depending on the substrates and the bond gap. Testing is recommended to evaluate the effect.

  • Comparable Materials for 3M Scotch-Weld General Purpose Instant Adhesives EC40

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    • PermaBond
      791(PermaBond)

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    • PermaBond
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Cure Time Test Methods
Cure Time Test Method
Fast
1,440 min Uncured
Fixture or Handling Strength Time Test Methods
Fixture or Handling Strength Time Fixture-Handling Strength Test Method
<0.25 min Uncured, On EPDM. Time to handling is substrate dependent.
Viscosity Test Methods
Viscosity Test Method
Low
20 to 45 cPs Uncured, Cone-Plate viscosity, CP75 at 3000/s shear rate
Shear Strength Test Methods
Shear Strength Type Substrate Test Method
2,000 psi Overlap Shear Strength Steel Cured, ASTM D-1002, Grit blasted
2,400 psi Overlap Shear Strength Stainless Steel Cured, ASTM D-1002, Grit blasted
1,700 psi Overlap Shear Strength Aluminum Cured, ASTM D-1002, Grit blasted
1,000 psi Overlap Shear Strength ABS Cured, ATSM D-1002, Substrate failure
800 psi Overlap Shear Strength Polycarbonate Cured, ASTM D-1002, Substrate failure
1,200 psi Overlap Shear Strength PVC Cured, ASTM D-1002, Substrate Failure
400 psi Overlap Shear Strength Nylon Cured, ASTM D-1002, Substrate Failure
800 psi Overlap Shear Strength Polypropylene Cured, ASTM D-1002, Substrate Failure, Primed with AC77
100 psi Overlap Shear Strength Silicone Elastomers Cured, ASTM D-1002, Substrate Failure, Primed with AC79
High Temperature Resistance Test Methods
High Temperature Resistance Test Method
82°C Cured
Low Temperature Resistance Test Methods
Low Temperature Resistance Test Method
-51°C Cured
Specific Gravity Test Methods
Specific Gravity Test Method
1.06 (g/ml) Uncured