H.B. Fuller EV Bond 343

H.B. Fuller EV Bond 343 is a medium-hardness, semi-flexible two– component polyurethane adhesive designed for bonding applications requiring resilient bonds, non-sag application and enhanced adhesion to flexible substrates. EV Bond 343 is suitable for bonding metals, ceramics, natural rubber, thermosetting polymers and select types of unprepared thermoplastic substrates such as ABS, polycarbonate and nylon.

Product Type: 2K (2 component) Adhesive, Structural Adhesive

Application Area: Batteries, Battery Packs, Electric Vehicle (EV)

Compatible Substrates & Surfaces: Acrylonitrile Butadiene Styrene (ABS), Ceramic, Elastomers & Rubbers, Metal, Nylon, Plastics, Polycarbonate (PC)

Chemical Family: Polyurethanes (PU)

Features: Ease Of Use, Easier Processing, Excellent Substrate Adhesion, Good Bonding Strength, Good Sagging Resistance, High Reliability, Highly Flexible, Medium Hardness, Resilient

Technical Data Sheet
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Enhanced TDS

Identification & Functionality

Features & Benefits

Ready-to-Use Product Features
Product Highlights
  • EV Bond 343 is suitable for bonding metals, ceramics, natural rubber, thermosetting polymers and select types of unprepared thermoplastic substrates such as ABS, Polycarbonate and Nylon.
  • It is recommended that this product be tested before use on any polymer not specifically noted above. Other types of Thermoplastic substrates may be suitably bonded with EV Bond 343 after physical or chemical pretreatment.

Applications & Uses

Application Area
Compatible Substrates & Surfaces
Mixing and Cure Schedule

To obtain the best cured properties, accurate proportioning and thorough mixing are essential. The production of the desired polyurethane requires accurate measurement of the two components and adequate mixing.

Ratio Part A Part B
By weight 100 125
By volume 100 100

The cure schedule is dependent upon the temperature. The recommended cure schedule will vary with the desired properties. The recommended schedule to achieve the typical properties is shown below: 18 hours at 25°C (77°F) -or- 2 hours at 80°C (176°F).


Component A
ValueUnitsTest Method / Conditions
Viscosity (at 25°C)16000cPs-
Weight per Gallon9.79lbs-
Specific Gravity (at 25°C)1.17--
Component B
ValueUnitsTest Method / Conditions
Viscosity (at 25°C)83000cPs-
Weight per Gallon12.11lbs-
Specific Gravity (at 25°C)1.45--
Filler TypeNon - abrasive--
Uncured Properties
ValueUnitsTest Method / Conditions
Gel Time (10g, blend)3 - 5minutes-
Filler Type (Component A)None--
Color (Blend)Black--
Viscosity (Blend, at 25°C)Thixotropic paste--
Tack-Free Time (Blend, 40 mil film)15minutes-
Typical Cured Properties
ValueUnitsTest Method / Conditions
Cast Tensile Elongation (7 day cure)avg. 160%-
Lap Shear Strength (Galvanized steel, solvent degreased, 7 day cure)avg. 1900psi-
Lap Shear Strength (Aluminum, solvent degreased, 7 day cure)avg. 2200psi-
Lap Shear Strength (Cold-rolled steel, solvent degreased, 7 day cure)avg. 3000psi-
Cast Tensile Strength (7 day cure)avg. 3709psi-
Lap Shear Strength (Polycarbonate, 7 day cure, substrate failure)min. 2000psi-
Hardness65.0Shore D

Safety & Health

Safety Information
  • These materials are intended for industrial use only, and the practices of good housekeeping, safety and cleanliness should be followed before, during and after use. Although the system contains low volatility materials, care should be taken in handling. Use adequate ventilation in the work area.
  • These materials may cause dermatitis in susceptible individuals. Keep off skin and out of eyes. In case of accidental skin contact, wash thoroughly with soap and water. In case of eye contact, flush eyes thoroughly with water and consult a physician immediately.

Packaging & Availability

Packaging Type
Regional Availability
  • Africa
  • Asia Pacific (Excluding Russia)
  • Europe (Excluding Russia)
  • India
  • Latin America
  • Middle East
  • North America
Typical Packaging
  • 200 mL Cartridge
  • 5 gal Pails
  • 55 gal Drums          

Storage & Handling

Shelf Life
6 Months
Storage and Shelf Life

These materials should be stored in a dry environment within a temperature range of 16°C to 27°C (60°F to 80°F). Extremes of temperature beyond this range may result in crystallization or polymerization of the materials. Introduction of a nitrogen blanket into the containers before closing will improve the storage life of the products.