H.B. Fuller

Features & Benefits

Labeling Claims

Low Odor

Features and Benefits Information

This product has following Features and Benefits

Thermally Conductive
No Surface Preparation Required
Excellent Adhesion Properties
Excellent Strength to Metals, E-Coat, Thermoplastics, Thermosets, and Engineering Plastics
High Impact Resistance
Suitable for Easy Manual and Pneumatic Dispensing
UL94 V0 Flame Retardancy
100% Reactive
Room Temperature Cure
10:1 meter-mix product for ease of application
Use on aluminum, stainless and plated steels forms tough, high strength bonds without surface preparation
Low Odor

Packaging & Availability

Packaging Type

Drums,

Pails

Regional Availability

North America

Packaging Information

EV Therm 420 is conveniently packaged in 50 ml, 490 ml, pail, and drum kits.

Physical Properties

Physical Form: Liquid
Appearance: Off white or amber viscous liquid

Properties

Cured Properties


	Value	Units	Test Method / Conditions
Dielectric Strength	18.1 - 19.9	kV/mm	-
Elongation at Break	min. 4	%	-
Gap Fill Dimension Hardness	75	Shore D	ASTM D2240
Thermal Conductivity	1	W/mK	-
Thermal Service Range	-67 to 212	°F	-

Technical Data


	Value	Units	Test Method / Conditions
Mix Ratio (by volume)	10:1	-	-
Mix Ratio (by weight)	14:1	-	-
Mixed Density (mixed)	1.55	g/cc	-

Uncured Properties


	Value	Units	Test Method / Conditions
Cure Temperature and Time (room temperature)	24	hours	-
Fixture Time	10 - 20	minutes	-
Flash Point	min. 200	°F	-
Open Time	6 - 9	minutes	-

Rheological Properties


	Value	Units	Test Method / Conditions
Viscosity (at 25°C, spindle 7, 20rpm, activator)	40,000 - 80,000	cPs	Brookfield RV7
Viscosity (at 25°C, spindle 7, 20rpm, resin)	100,000 - 150,000	cPs	Brookfield RV7

Cured Mechanical Properties


	Value	Units	Test Method / Conditions
Over Lap Shear Strength Aluminum (at 25°C, 50% RH, aluminum)	16	MPa	ASTM D1002
Over Lap Shear Strength Carbon Steel (at 25°C, 50% RH, carbon steel)	16	MPa	ASTM D1002
Over Lap Shear Strength Nickel Coated Low - Carbon Steel Plated (at 25°C, 50% RH, coated low - carbon steel plated)	22	MPa	ASTM D1002

Typical Properties


	Value	Units	Test Method / Conditions
Storage Temperature	55 - 75	°F	-

Appearance

Off white or amber viscous liquid

Regulatory & Compliance

Certifications & Compliance: UL 94

Storage & Handling

Storage Information: Product should be stored in a cool dry place out of direct sunlight. The shelf life of EV Therm 420 is 9 months from date of manufacture. Shelf life is based on the products being stored properly at temperatures between 55°F and 75°F. Exposure to temperatures above 75°F will reduce the shelf life. This product should NEVER BE FROZEN.
Shelf Life: 9 months

Technical Details & Test Data

General Instructions: The product is best used at temperatures between 65°F and 80°F. Temperatures below 65°F will slow the cure speed of the material and viscosities will be higher. Temperatures above 80°F will cause the material to cure faster and viscosities will be lower. For consistent dispensing maintain temperature in the above mentioned range. For optimum bond strength and to insure maximum performance in the finished assembly mate parts together within the specified work time of the adhesive. Make sure the bond joint has uniform coverage and that a sufficient amount of adhesive is in the bond area. It is important to have the adhesive applied, parts aligned and positioned, within the established work times for the product. To ensure maximum performance in the finished assembly parts should remain undisturbed until the fixture time is reached.

Thermal Properties

Flame Rating: UL 94 V0

H.B. Fuller EV Therm 420

Enhanced TDS

Identification

Applications

Features