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FusionBond® 381

1 of 6 products in this brand
Hernon Fusionbond® 381 is a two components methacrylate adhesive. It is specially formulated for structural bonding of thermoplastics, metal, wood, and composite assemblies. Fusionbond® 381 is an excellent choice for composite bonding applications in the marine, automotive and construction industries because it requires virtually no surface preparation. Fusionbond® 381 provides toughness at temperatures from -67 to 250°F.

Product Type: 2K (2 component) Adhesive, Solvent free (100% Solids) Adhesive, Structural Adhesive

Compatible Substrates & Surfaces: Aluminum, Brass, Ceramic, Copper, Elastomers & Rubbers, Fiberglass, Metal, Steel, Titanium, Wood

Chemical Family: Acrylics, Acrylates & Methacrylates

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Identification & Functionality

Features & Benefits

Product Benefits
  • 100% solid.
  • Easy mixing ratio of 1:1 by volume.
  • Almost no surface preparation is needed.
  • Superior fatigue and impact resistance.
  • Outstanding environmental resistance.
  • Exceptional at bonding dissimilar substrates.
  • Excellent salt spray resistance and gap filling ability.
  • Dramatically reduces assembly cost.

Applications & Uses

Handling and Application

Mixing

It is highly recommended that either meter mix equipment or cartridges with static mix nozzles be used to properly ratio and dispense the adhesive. For hand mixing, combine Part A and Part B in the correct ratio and mix thoroughly. Heat buildup during and after mixing is normal. To reduce the likelihood of exothermic reaction or excessive heat buildup, mix less than 100 grams at a time. Mixing smaller amounts will minimize heat buildup.


Applying

Bonding surfaces should be clean, dry, and free of contamination. Extensive surface preparation is not required for Fusionbond® 381 and good bonds can be formed on most substrates after a solvent wipe. To assure maximum bond strength, surfaces must be mated within the adhesive's open time. Use enough material to completely fill the joint when parts are clamped.


Curing

Parts should remain undisturbed during the interval between the adhesive’s open time and fixture time. After the fixture time is achieved the material has reached handling strength. Cure temperatures below room temperature (70ºF to 75ºF) will slow the fixturing time. Temperatures above room temperature will shorten the open time and the fixturing time.


Clean Up

It is important to clean up excess adhesive from the work area and application equipment before it cures. Use Hernon® Cleaner 62 for removing uncured adhesive. Fusionbond® 381 is flammable. Keep containers tightly closed after use. Keep away from heat, sparks, and open flames.

Properties

Typical Curing Performance
Property Value
Working time,minutes 5 to 10
Fixture time, as received steel, minutes <30
Typical Cured Performance

Shear Strength, ASTM D1002 Grit-blasted lap-shear specimens

Substrate Cure at 22ºC Value, psi
Steel 24 Hours 3000-4000

Impact Strength, ASTM D6110 Grit-blasted lap-shear specimens

Substrate  Cure Time at 22ºC Value, joules
Steel 24 hours ≥12

 

Technical Details & Test Data

Bondable Substrates
  • ABS.
  • PBT blends.
  • Acrylics (PMMA).
  • PET blends.
  • Aluminum.
  • Phenolics.
  • Anodized metals.
  • Polycarbonate and blends.
  • Brass.
  • Polyurethanes 1.
  • Ceramics.
  • PPO and PPO blends.
  • Copper.
  • PVC & Vinyls.
  • Epoxy.
  • Rim urethane.
  • Fiberglass.
  • Rubber.
  • Galvanized metals.
  • Stainless steel.
  • Gel Coats.
  • Steel.
  • Nylon 6 or Nylon 6 Alloys1.

(¹ May need special treatment)

General Information

This product is not recommended for use in pure oxygen and/or oxygen rich systems and should not be selected as a sealant for chlorine or other strong oxidizing materials. For safe handling information on this product, consult the Safety Data Sheet (SDS).

Storage & Handling

Storage

Fusionbond® 381 should be stored in a cool, dry location in unopened containers at a temperature between 45ºF and 75ºF (7ºC and 24ºC) unless otherwise labeled. Shelf life can be extended by refrigeration at 45ºF to 55ºF (7ºC to 13ºC). To prevent contamination of unused material, do not return any material to its original container.