Products

3M™ Hot Melt Adhesive 3797, Amber, 100% Solids Thermoplastic Adhesive

Brand: 3M™
Product Number: 3797
Technologies: Hot Melt Adhesive
Color: Amber
Cure Type: Thermoplastic (Hot Melt)
Package Sizes:

  • 5/8 in x 8 in (Q)
  • 5/8 in x 2 in (TC)
  • 1 in x 3 in (PG)
  • 1/8 in Bulk

Shelf Life: 24 months

Product Description

3M™ Hot Melt Adhesive 3797 is a 100% solids, fast-flowing thermoplastic adhesive specifically formulated for electrical potting, strain relief, and wire securing applications. Its low viscosity ensures fast flow rates, making it ideal for encapsulating and rigidizing components. The adhesive offers high-temperature resistance and strong adhesion to metals, plastics, and wood, providing durability in demanding industrial applications.


Key Features

  • Low Viscosity: Ensures fast flow for effective encapsulation and potting.
  • High-Temperature Resistance: Withstands temperatures up to 149°C (300°F).
  • Fast Set Time: Rapidly gains bond strength, increasing production efficiency.
  • Versatile Bonding: Strong adhesion to wood, plastics, metals, and glass.

Recommended Applications

  • Electrical Potting: Encapsulating electronic components for protection.
  • Wire Securing & Bundling: Preventing cable strain and breakage.
  • Component Rigidizing: Stabilizing printed circuit boards and electrical assemblies.
  • Coil Termination: Securing electrical connections in coils and transformers.
  • Cable Strain Relief: Reducing mechanical stress on wiring and terminations.

Technical Data

Typical Uncured Physical Properties

Attribute Name Test Method Temperature Value
Color Amber
Density 0.92 g/cm³
Open Time 30 seconds
Viscosity Brookfield Thermocel Viscometer (#27 Spindle @ 10 RPM) 190.6°C (375°F) 2,650 cP
Flash Point ASTM D92-72 298.9°C (570°F)

Typical Cured Characteristics

Attribute Name Test Method Value
Ball & Ring Melt Point ASTM E28-67 163°C (325°F)

Typical Performance Characteristics

Attribute Name Test Method Temperature Substrate Value
180° Peel Adhesion 23°C (73°F) Flexible Canvas to Douglas Fir 10 lb/in
Overlap Shear Strength 23°C (73°F) Douglas Fir 350 psi
Application Temperature 177 – 196°C (350 – 385°F)
Temperature Resistance 149°C (300°F)

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