Brand Name: DOWSIL™ 3-1953 Conformal Coating
Available Sizes:
Shelf Life: Approximately 12 months (1 year) from the date of manufacture.
DOWSIL™ 3-1953 Conformal Coating is a one-part, translucent, medium-viscosity, solventless silicone elastomer designed for protecting rigid and flexible circuit boards, electronic printed wiring boards (PWB), sensitive components, and fine-pitched designs. It cures at room temperature with the option for mild heat acceleration, forming a soft, stress-relieving coating. The coating contains a UV indicator to facilitate inspection and is UL, IPC, and Mil Spec qualified.
Applications:
DOWSIL™ 3-1953 Conformal Coating
Typical Properties:
| Property | Unit | Value |
|---|---|---|
| One or Two-part | – | One |
| Color | – | Translucent |
| Viscosity | cP | 350 |
| Specific Gravity (Cured) | – | 0.98 |
| Non-Volatile Content (NVC) | % | 99.4 |
| Tack-Free Time at 25ºC | minutes | 8 |
| Tack-Free Time at 60ºC/15% RH | minutes | 0.5 |
| Tensile Strength | MPa | 0.5 |
| Elongation | % | 60 |
| Durometer | Shore A | 34 |
| Dielectric Strength | kV/mm | 17 |
| Volume Resistivity | ohm·cm | 5.5 x 10¹⁵ |
| Dissipation Factor at 100 Hz | – | 0.0007 |
| Dissipation Factor at 100 kHz | – | <0.0002 |
| Hardening Transition by DSC | °C | -49 |
| UL Flammability Classification | – | 94 V-0 |
| Mil Specification | – | Mil I-46058C Amend 7 |
| Agency Listing | – | IPC-CC-830A with Amendment 1, UL 746E |
| Cyclotetrasiloxane (D4) Content | % | <0.1 |
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