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3M™ Scotch-Weld™ Epoxy Adhesive 1386, Cream, A One-Part, 100% Solids, Thermosetting Liquid Adhesive

Brand: 3M™ Scotch-Weld™
Product Number: 1386
Technologies: Epoxy
Color: White – Cream
Cure Type: Heat Cure
Package Sizes: 950 mL
Shelf Life: 12 months

Product Description

3M™ Scotch-Weld™ Epoxy Adhesive 1386 is a one-part, 100% solids, thermosetting liquid adhesive designed for structural bonding applications requiring high strength at service temperatures from -70°F to 250°F (-57°C to 121°C). This adhesive offers high impact, peel, and bond strength compared to standard epoxy-based adhesives. It emits little to no volatile by-products during curing, making it ideal for bonding impervious surfaces with minimal applied pressure​.


Key Features

  • High-Temperature Resistance: Maintains strength at service temperatures from -70°F to 250°F (-57°C to 121°C).
  • High Strength: Offers superior impact, peel, and bond strength compared to traditional epoxies.
  • Minimal Volatiles: Enables curing with little or no pressure, making it suitable for impervious surfaces.
  • UL 94 HB Rated: Recognized for flame resistance.
  • Versatile Application: Suitable for knife coating, trowel, roller, pump, or high-pressure injection.

Recommended Applications

  • Structural bonding of metals, composites, and plastics in high-performance industries.
  • Bonding impervious surfaces in aerospace, automotive, and industrial manufacturing.
  • Applications requiring high peel and impact strength.
  • Heat-resistant applications where minimal applied pressure during curing is necessary.

Technical Data

Typical Uncured Physical Properties

Attribute Name Value
Color White – Cream¹
Viscosity 75,000 – 175,000 cP²
Net Weight 9.4 – 9.8 lb/gal
Base Resin Modified Epoxy

¹ Colors may vary from nearly white to yellow/amber; performance is not affected.
² Measured using Brookfield RVF No. 7 Spindle @ 4 rpm​.


Typical Cured Characteristics

Attribute Name Value
Cured Color White – Cream

Typical Performance Characteristics

Attribute Name Test Method Value
T-Peel Adhesion (Etched Aluminum, 23°C / 73°F) ASTM D1876 10 lb/in width¹
Tensile Strength (-40°C / -40°F) 8,293 lb/in²
Tensile Strength (23°C / 73°F) 10,189 lb/in²
Tensile Strength (82°C / 180°F) 3,178 lb/in²

¹ 1″ x 7″ bonded area on clad 2024-T3 aluminum panels, 0.003-0.005″ adhesive application, tested at 2 in/min jaw separation​.


Electrical and Thermal Properties

Attribute Name Test Condition Value
Coefficient of Thermal Expansion (-40°C to 44°C) 0°F
Coefficient of Thermal Expansion (44°C to 116°C) 0°F
Dissipation Factor 0.057
Dielectric Strength ASTM D149 >16 V/μm

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