• Description for 3M 1386

    A one-part, 100% solids, thermosetting liquid adhesive. Higher impact, peel and bond strength properties. Application by knife coating, trowel, roller coating and high pressure injection methods.

    *See Terms of Use Below

    Application Type Bond
    1 Part or 2 Part 1 Part
    Material Form Liquid
    Substrate Etched Aluminum, Epoxy, Metal, Aluminum
    Manufacturer 3M
    Chemistry Epoxy, Epoxy: Modified Epoxy Resin
    Application Method Trowel
    Cure Method Heat
    Cure Temperature (°C) 176 to 178
    Cure Time (min) 59 to 61
    Viscosity (cPs) 75,000 to 175,000
    Color Light Cream
    Creep Resistance Creep resistance
    Chemical Resistance .8% (Rust Inhibitor) 99.2% Tap Water, 1.2% (Radiator Conditioner) 98.9% Tap Water, 26% Methyl Alcohol 74% Tap Water, 28.6%Ethylene Glycol 71.4% Tap Water Blend, Salt Spray, Tap Water, Type III Hydrocarbon Fluid, Chemical Resistance
    High Temperature Resistance (°C) 121, 82
    Low Temperature Resistance (°C) -57, -55
    Density (g/cm³) 9.4 to 9.8 (weight (lbs/gal))
    Key Specifications Mil-Spec (United States Military Standard): A-8623A: MMM-A-132 Type III; MIL-A-8623A Type III; MMM-A-134 Type III, Mil-Spec (United States Military Standard): MMM-A-132: MMM-A-132 Type III; MIL-A-8623A Type III; MMM-A-134 Type III, Mil-Spec (United States Military Standard): MMM-A-134: MMM-A-132 Type III; MIL-A-8623A Type III; MMM-A-134 Type III
  • Technical Data for 3M 1386

    Overview
    • Application Type
    • 1 Part or 2 Part
      • 1 Part or 2 Part - 1 Part
    • Material Form
      • Liquid
    • Substrate
    • Chemistry
      • Epoxy
      • Epoxy: Modified Epoxy - Modified Epoxy Resin
    • Application Method
      • Roll - Roller Coating
      • Spatula/Trowel - Trowel
      • Other - Knife coating, Pump , High Pressure Injection Methods
    • Cure Method
      • Heat
    • Color
      • Off-White - Light Cream
    • Key Specifications
      • Mil-Spec (United States Military Standard): A-8623A: Type III - MMM-A-132 Type III; MIL-A-8623A Type III; MMM-A-134 Type III
      • Mil-Spec (United States Military Standard): MMM-A-132: Type III - MMM-A-132 Type III; MIL-A-8623A Type III; MMM-A-134 Type III
      • Mil-Spec (United States Military Standard): MMM-A-134: Type III - MMM-A-132 Type III; MIL-A-8623A Type III; MMM-A-134 Type III
    Specifications
    Cure Specs
    Cure Temperature (°C) 176 to 178
    Cure Time (min) 59 to 61
    Viscosity (cPs) 75,000 to 175,000 Test Method
    Work / Pot Time (min) 525,600
    Bond Strength
    Structural/Load-Bearing Structural
    General Bond Strength (psi) High
    Peel Strength (piw) 10 Test Method
    Shear Strength (psi) 5,500, 5,500, 5,300, 4,300, 3,500, 2,500, 2,500, 1,250, None, 2,500, 2,500, 1,500, None Test Method
    Cleavage Strength (psi) 1500 (lbs) Test Method
    Impact Strength (psi) Higher, 5 (ft./lbs.), 45 (ft./lbs) Test Method
    Tensile Strength (psi) 8,293, 10,189, 3,178 Test Method
    Material Resistance
    Creep Resistance Creep resistance
    Chemical Resistance .8% (Rust Inhibitor) 99.2% Tap Water, 1.2% (Radiator Conditioner) 98.9% Tap Water, 26% Methyl Alcohol 74% Tap Water, 28.6%Ethylene Glycol 71.4% Tap Water Blend, Salt Spray, Tap Water, Type III Hydrocarbon Fluid, Chemical Resistance
    Environmental Resistance Accelerated Weathering, Environmental resistance
    High Temperature Resistance (°C) 121, 82
    Low Temperature Resistance (°C) -57, -55
    Impact Resistance Impact resistance
    Conductivity
    Dissipation Factor 0.05700, 0.05900, 0.10100, 0.12900, 0.13800, 183.00000 Test Method
    Dielectric Strength (V/mil) 400
    Dielectric Constant 5.11, 5.28, 5.55, 6.07, 7.35, 8.37 Test Method
    Other Properties
    Coefficient of Thermal Expansion (CTE) 4.65e-5, 4.96e-5 Test Method
    % Solids (%) 100
    Density (g/cm³) 9.4 to 9.8 (weight (lbs/gal))
    Business Information
    Shelf Life Details Store 3M™ Scotch-Weld™ Epoxy Adhesive EC-1386 at 40°F (4°C) or lower for optimum storage life. 3M™ Scotch-Weld™ Epoxy Adhesive EC-1386 should be permitted to thoroughly warm to room temperature before opening in order to prevent moisture condensation of the adhesive surface. Rotate stock on a “first in-first out” basis. 3M™ Scotch-Weld™ Epoxy Adhesive EC-1386 has a shelf life of 15 months from date of shipment when stored at 40°F (4°C) and 24 months from date of shipment when stored at 0°F (-17°C) or below in original, unopened container., Store 3M™ Scotch-Weld™ Epoxy Adhesive EC-1386 at 40°F (4°C) or lower for optimum storage life. 3M™ Scotch-Weld™ Epoxy Adhesive EC-1386 should be permitted to thoroughly warm to room temperature before opening in order to prevent moisture condensation of the adhesive surface. Rotate stock on a “first in-first out” basis. 3M™ Scotch-Weld™ Epoxy Adhesive EC-1386 has a shelf life of 15 months from date of shipment when stored at 40°F (4°C) and 24 months from date of shipment when stored at 0°F (-17°C) or below in original, unopened container.
    Shelf Life Temperature (°F) 39, <1
    Shelf Life Type From Date of Shipment , From Date of Shipment
    Shelf Life (mon) 15, 24
  • Best Practices for 3M 1386

    *See Terms of Use Below

    1. Surface Preparation

      A thoroughly cleaned, dry, grease free surface is essential for maximum performance. Cleaning methods which will produce a break-free water film on metal surfaces are generally satisfactory. Surface preparations should be fully evaluated with the adhesive, especially if resistance to specific environments are anticipated.

      See Vendor Technical Data Sheet for more info.

    2. Application

      Appropriate application equipment can enhance adhesive performance. The user is responsible for evaluating application equipment in light of the user’s particular purpose and method of application.

      Scotch-Weld EC-1386 can be applied by a spatula, knife coat, notched trowel, or by extruding into places. Standard equipment is available which allows pumping directly from five-gallon pails. When extruded through a Pyles-Semco cartridge (3/32" orifice 70 psi line pressure), the delivery rate at 72°F (22°C) is approximately 20 grams/minute. A lower viscosity for ease of application can be obtained by warming Scotch-Weld EC-1386 to 100 - 120°F (38 - 49°C). Note: Scotch-Weld EC-1386 may start to thicken if held at 120°F (49°C) for more than 4 hours.

    3. Curing

      The pressure needed during the cure of Scotch-Weld EC-1386 is typically that required to keep parts in alignment and to overcome distortion and thermal expansion in the adherends.

      The cure temperature may be varied from 330 to 500°F (166 to 260°C) depending on the materials being bonded, equipment available and bond properties desired. Scotch-Weld EC-1386 will wet the surface to which it has been applied. Heating at temperatures above 325°F (163°C) will chemically convert the adhesive into a high strength solvent-resistant bond.

      Cure time depends on the cure temperature used, methods of heat application, production limitations and bond properties required. Since no two bonding operations are exactly alike, it is suggested that a few simple experiments be conducted, varying both temperature and cure time, to determine optimum conditions for the particular application. Figure 1 is a guide from which an approximate cure cycle can be taken for various cure times or temperatures.

    4. Clean-Up

      Excess adhesive and equipment may be cleaned up, prior to curing with Ketone type solvents.*

      *Note: When using solvents extinguish all ignition source and follow manufacturer’s precautions and directions for use for handling such materials.

  • Comparable Materials for 3M 1386

    *See Terms of Use Below

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Viscosity Test Methods
Viscosity Test Method
75,000 to 175,000 cPs Brookfield RVF No. 7 Spindle @ 4 rpm
Shear Strength Test Methods
Shear Strength Cure Time Cure Temperature Substrate Test Temperature Test Method
5,500 psi 40 to 60 min 24°C 177°C
5,500 psi 20 to 30 min 24°C 191°C
5,300 psi 15 to 20 min 24°C 204°C
4,300 psi 10 to 15 min 24°C 218°C
3,500 psi 5.00 to 7 min 24°C 232°C
2,500 psi Aluminum to Aluminum -54 to -56°C Cohesive failure
2,500 psi Aluminum to Aluminum 22 to 24°C Cohesive failure
1,250 psi Aluminum to Aluminum 81 to 83°C Cohesive failure
None Aluminum to Aluminum 120 to 122°C Cohesive failure
2,500 psi Aluminum to Aluminum -54 to -56°C Cohesive failure
2,500 psi Aluminum to Aluminum 22 to 24°C Cohesive failure
1,500 psi Aluminum to Aluminum 81 to 83°C Cohesive failure
None Aluminum to Aluminum 120 to 122°C Cohesive failure
Tensile Strength Test Methods
Tensile Strength Cure Time Cure Temperature Test Temperature Test Method
8,293 psi 60 min 177°C -40°C Cure Cycle: 1 hour @ 350°F (177°C)
10,189 psi 60 min 177°C 24°C Cure Cycle: 1 hour @ 350°F (177°C)
3,178 psi 60 min 177°C 82°C Cure Cycle: 1 hour @ 350°F (177°C)
Peel Strength Test Methods
Peel Strength Type Cure Time Cure Temperature Substrate Test Temperature
10 piw T-peel strength 60 min 177°C Etched Aluminum 22 to 24°C
Cleavage Strength Test Methods
Cleavage Strength Substrate Test Temperature Test Method
1500 (lbs) Aluminum to Aluminum 22 to 24°C ASTM D 1062-49T, MIL-A-8623
Impact Strength Test Methods
Impact Strength Substrate Test Temperature Test Method
Higher Aluminum to Aluminum 22 to 24°C Cohesive failure, FED STD-MMM-A-175
5 (ft./lbs.) Aluminum to Aluminum 22 to 24°C Cohesive failure, FED STD-MMM-A-175
45 (ft./lbs) 22 to 26°C Cohesive Failure, Impact strength was measured according to ASTM D 950-54 (Izod Impact Tester 30 lbs. wt.) methods using 1/2 in. x 1/2 in. square specimens of 2024 T3 aluminum.Scotch-Weld EC-1386 was applied in a thin coat (.003 in. x .005 in. thick) on both surfaces.
Dielectric Constant Test Methods
Dielectric Constant Temperature
5.11 23°C
5.28 60°C
5.55 90°C
6.07 105°C
7.35 120°C
8.37 135°C
Dissipation Factor Test Methods
Dissipation Factor Temperature
0.05700 23°C
0.05900 60°C
0.10100 90°C
0.12900 105°C
0.13800 120°C
183.00000 135°C
Coefficient of Thermal Expansion (CTE) Test Methods
Coefficient of Thermal Expansion (CTE) CTE Temperature (°C)
4.65e-5 -40 to 44°C
4.96e-5 44 to 116°C