RTVS 3-95-2
Harmonization Code : 3910.00.00.90 | Silicones in Primary Forms; Others
Main features
- 1:1 weight or volume mix
- 1.44 W/(m K) thermal conductivity
- -55 to 260 deg C service range
Product Description
INSULCAST RTVS 3-95-2 Thermally Conductive Silicone Potting Compound is a two-part, 1:1 red-and-white RTV silicone system for thermally conductive electrical potting and encapsulation. Parts A and B each have a typical viscosity of 35,000 cP at 25 deg C, and the mixed material provides a 1.5-hour pot life at the same temperature. Room-temperature and accelerated heat-cure schedules support different production windows. After cure, the silicone combines 1.44 W/(m K) thermal conductivity with electrical insulation, 85 Shore A hardness, and a service range from -55 to 260 deg C. Applications include protected electronic assemblies requiring heat transfer and dielectric performance.
Key features
- Simple 1:1 mixing: Parts A and B use the same ratio by weight or volume
- Flexible cure scheduling: Room-temperature and accelerated heat-cure options are available
- Thermal and electrical function: Cured material combines 1.44 W/(m K) conductivity with dielectric properties
Applications
Potting and encapsulation of electronic assemblies requiring thermal conductivity, electrical insulation, and high-temperature service.
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Mechanical Properties
Thermal Properties
Additional Information
As-supplied / before-processing properties
Typical uncured values; maintain the stated component identity and 1:1 ratio.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Part A color | Red | As supplied | |
| Part B color | White | As supplied | |
| Component viscosity | 35,000 | cP | ASTM D2393 at 25 deg C; Parts A and B |
| Specific gravity | 2.36 / 2.27 | Part A / Part B at 25 deg C | |
| Mix ratio | 1:1 | By weight or volume | |
| Mixed viscosity | 35,000 | cP | At 25 deg C |
| Pot life | 1.5 | hours | At 25 deg C |
| Gel time | 2-4 | hours | At 25 deg C |
After-processing / final-state properties
Typical cured properties; final performance depends on the selected cure schedule and test condition.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Thermal conductivity | 1.44 | W/(m K) | ASTM D5470 |
| Hardness | 85 | Shore A | Cured material |
| Tensile strength | 400 | psi | ASTM D412; 2.9 MPa |
| Elongation | 17 | % | ASTM D412 |
| Dielectric strength | 425 | V/mil | Cured material |
| Volume resistivity | 1 x 10^14 / 1 x 10^13 | ohm-cm | At 25 deg C / 125 deg C |
| Service temperature range | -55 to 260 | deg C | Documented range |
