Robert McKeown Company, Inc.
Robert McKeown Company, Inc.
111 Chambers Brook Road
Branchburg NJ 08876
Toll Free: 1.800.631.1125
Phone: 908.218.9000
Fax: 908.218.8949
Email: sales@robertmckeown.com
Website: www.robertmckeown.com
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2-part, translucent green, 1:1 mix ratio, fast room temperature cure. Tough gel with UV indicator, conditional primerless adhesion and good flame resistance
Unit of Measure

Specifications

Type

 N/A Primerless Silicone Encapsulants

Mix Ratio

 N/A 1:1

Color

 N/A Green Translucent

Viscosity

 N/A 425 mPa/s

Durometer

 N/A 30

Specific Gravity

 N/A 0.97

Working Time at Room Temperature

 N/A 10 min

Flammability Classification

 N/A 94 V-1

Thermal Conductivity

 N/A 0.15 W/m·K3.6 x 10-4 cal/cm·s-ºC

Linear Coefficient of Thermal Expansion

 N/A 325 ppm

Shelf Life from Date of Manufacture

 N/A 6 months

Dielectric Strength

 N/A 425 V/mil17 kV/mm

Dielectric Constant at 100 Hz

 N/A 2.85

Dielectric Constant at 100 kHz

 N/A 2.86

Dissipation Factor at 100 Hz

 N/A 0.03

Dissipation Factor at 100 kHz

 N/A < 0.0001

Volume Resistivity

 N/A 7.1 x 1013 O/cm

Features

N/A
Fast room temperature cure; two parts are blue and yel low and turn green when mixed; conditional primerless adhesion at room temperature; mechanical strength; UL 94 V-1 flammability rating; UV indicator for inspection. Under certain conditions in specific designs or applications, Dow 3-4207 Dielectric Tough Gel may lose adhesion; full environmental exposure testing is recommended.

Potential Uses

N/A
Encapsulating applications for various electronic devices, especially those requiring stronger adhesion or improved dimensional stability

Application Methods

N/A
Supplied as two-part liquid component kits comprised of Part A/Part B to be mixed in a 1:1 ratio by weight or volume; automated or manual mixing and dispensing can be used

Cure

N/A
1.5 hours at room temperature
10 minutes at 50 °C (122 °F)
3 minutes at 100 °C (212 °F)

Note: These data were collected on 50–100 gram samples of a lot believed to be typical and should be used as initial estimates of cure times. Times will vary slightly from batch to batch and can be longer or shorter due to thermal mass of your parts and your heating ramp rate. Pretesting is recommended to confirm adequate cure for your application.
For primerless adhesion products, cure time is based on time to reach durometer. Full adhesion may take more time at the cure temperature.