Specialty Materials for Electronic Assembly
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All Categories > Electronics Potting & Encapsulation > Silicone Potting/Encapsulants > Item # Sylgard® 186 Silicone Elastomer  
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Item # Sylgard® 186 Silicone Elastomer, Silicone Potting/Encapsulants


Silicone-Potting-Encapsulants

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2-part, 10:1 mix, translucent encapsulant with high tear strength




Specifications  · Features  · Potential Uses  · Application Methods  · Cure

Specifications

Type
Silicone Encapsulants

Mix Ratio
10:1

Color
Translucent

Viscosity
66700 mPa/s

Durometer
24

Specific Gravity
1.12

Working Time at Room Temperature
4 h

Flammability Classification
94 HB

UL Temperature Index, Electrical/Mechanical
140/140 ºC

Thermal Conductivity
0.21 W/m·K
4.8 x 10-4 cal/cm·s-ºC

Linear Coefficient of Thermal Expansion
330 ppm

Shelf Life from Date of Manufacture
12 months

Dielectric Strength
450 V/mil
18 kV/mm

Dielectric Constant at 100 Hz
2.70

Dielectric Constant at 100 kHz
2.68

Dissipation Factor at 100 Hz
0.00002

Dissipation Factor at 100 kHz
0.00006

Volume Resistivity
5.0 x 1015 O/cm


Features

10:1 mix ratio; high viscosity; room temperature or heat cure; high tear strength; UL recognized


Potential Uses

General potting applications: power supplies, connectors, sensors, industrial controls, transformers, amplifiers, high voltage resistor packs, relays; adhe- sive/encapsulant for solar cells; adhesive handling beam lead integrated circuits during processing


Application Methods

Supplied as two-part liquid component kits comprised of Base/Curing Agent to be mixed in a 10:1 ratio by weight or volume; automated mixing and dispensing; manual mixing


Cure

48 hours at room temperature
25 minutes at 100 °C (212 °F)
15 minutes at 150 °C (302 °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.