Brand Name: DOWSIL™ EA-4900 White RTV Adhesive
Package Size: Available in 330 mL cartridges
Shelf Life: Approximately 12 months from the date of manufacture.
1. Product Overview
DOWSIL™ EA-4900 White RTV Adhesive is a one-part, white, non-flowing, room-temperature vulcanizing (RTV) adhesive. It features a fast tack-free time and does not require mixing. The adhesive is composed of a polydimethylsiloxane with an alkoxy cure system and has a UL 94 V-0 flammability rating.
2. Applications
This adhesive is suitable for sealing equipment and modules on circuit boards. It provides durable adhesion to various substrates, including metals, ceramics, and glass, making it ideal for electronic assembly applications.
DOWSIL™ EA-4900 White RTV Adhesive
Typical Properties
| Property | Unit | Value |
|---|---|---|
| One or Two-part | – | One |
| Color | – | White |
| Extrusion Rate | g/min | 2,131 |
| Specific Gravity (Uncured) | – | 1.70 |
| Tack-Free Time at 25°C | minutes | 5 |
| Tensile Strength | psi (MPa) | 580 (4.0) |
| Elongation | % | 31 |
| Durometer | Shore A | 80 |
| Unprimed Adhesion – Lap Shear to Aluminum | psi (MPa) | 231 (1.6) |
| Unprimed Adhesion – Lap Shear to Glass | psi (MPa) | 60 (0.4) |
| Dielectric Strength | volts/mil (kV/mm) | 625 (25) |
| Volume Resistivity | ohm·cm | 1.0E+16 |
| Dielectric Constant at 100 kHz | – | 3.71 |
| Dissipation Factor at 100 kHz | – | 0.0118 |
| Thermal Conductivity | W/m·K | 0.7 |
| Content of Low Molecular Siloxane (D4-D10) | ppm | <300 |
| UL Flammability Classification | – | 94 V-0 |
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