Specialty Materials for Electronic Assembly
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All Categories > Conformal Coatings > Silicone Dow Electronics Conformal Coatings > Item # 3140 RTV Coating  
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Item # 3140 RTV Coating, Silicone Dow Electronics Conformal Coatings


Silicone Dow® Electronics Conformal Coatings

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1-part, translucent coating; good flowability; good flame resistance; UL, IPC, and Mil Spec approved/recognized




Specifications  · Features  · Potential Uses  · Application Methods  · Cure

Specifications

Type
Solventless RTV Elastomeric Conformal Coatings

Product Form
1-part RTV cure

Color
Translucent

Viscosity
35950 mPa/s

Durometer
34 A

Specific Gravity
1.04

Room Temperature Tack-Free Time
105 min

Room Temperature Cure Time
72 h

Flammability Classification
94 V-1

UL 746E Approval
Yes

Shelf Life from Date of Manufacture
12 months

Military Specification
MIL-I-46058C, Amend. 7

Type, Class, Group
Type SR, QPL

Dielectric Strength
450 V/mil
18 kV/mm

Dielectric Constant at 100 Hz
2.52

Dielectric Constant at 100 kHz
2.52

Dissipation Factor at 100 Hz
0.004

Dissipation Factor at 100 kHz
0.001

Volume Resistivity
2.1E+14 O/cm


Features

Good flowability; room-temperature cure; no added solvents; UV indicator for inspection; UL 94V-1 recognized, IPC-CC-830, and MIL-A-46146


Potential Uses

Supplied at a higher viscosity, this material cures to a tough, durable elastomer for improved pin/solder joint coverage and thin-section encapsulation.


Application Methods

Applied by brush or flow coating or syringe dispensed for spot protection of pins or other devices.


Cure

Time to cure is dependent on several variables including the method of application, film thickness, temperature and humidity. Tack- free time in the data table gives an indication of typical times until surface is dry enough to handle. Cure time for full cure are indications of time needed to develop full physical properties such as durometer, tensile strength or adhesion. These times, including full cure time, can be significantly improved by introducing mild heat of 60 °C or less.