COOLTHERM 6756
Harmonization Code : 3910.00.00.90 | Silicones in Primary Forms; Others
Main features
- Adhesion-Promoting Surface Treatment
- 1 cP Application Viscosity
- Recommended 3 to 10 um Film Thickness
Product Description
Circalok™ 6756 Primer is a single-component, low-viscosity silicone adhesion promoter developed for electronics applications involving room-temperature-vulcanizing silicone rubbers. The clear or red liquid is applied to prepared metal or glass surfaces before the silicone material to support interfacial adhesion. It has a typical viscosity of 1 cP at 25 °C and a specific gravity of 0.77. Circalok 6756 may be applied by brush or spray, with a recommended primer-film thickness of 3–10 µm, followed by 60–90 minutes of air drying at 25 °C before silicone application.
Key features
- Silicone adhesion promotion: Supports bonding of RTV silicone rubbers to most metals and glass in electronics applications.
- Low-viscosity application: Provides a typical viscosity of 1 cP at 25 °C for brush or spray application.
- Controlled primer layer: Uses a recommended film thickness of 3–10 µm with 60–90 minutes of air drying at 25 °C.
Applications / Suitable for
- Priming metal surfaces before application of RTV silicone rubber
- Priming glass surfaces before application of RTV silicone rubber
- Electronics assemblies requiring silicone-to-substrate adhesion promotion
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TDS, SDS & Technical Documents
Technical Specifications
General Properties
Physical Properties
Thermal Properties
Additional Information
As-supplied / before-processing properties
Typical properties and application conditions for Circalok 6756 Primer before silicone application. Values are not intended for specification purposes.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Product form | Single-component liquid primer | — | Silicone adhesion promoter |
| Appearance | Clear or red liquid | — | As supplied |
| Dynamic viscosity | 1 | cP | At 25 °C; test method not stated |
| Specific gravity | 0.77 | — | Test temperature and method not stated |
| Recommended primer-film thickness | 3–10 | µm | Applied by brush or spray for optimum adhesion |
| Air-drying time | 60–90 | minutes | At 25 °C before applying RTV silicone |
