Loctite SI 5920 Copper RTV Silicone Gasket Maker – High-Temperature
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Regular price
$ 5.99 USD
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Loctite SI 5920 is a copper-colored silicone gasket maker for flexible flanges exposed to high temperatures. Its non-corrosive, moisture-curing formula is also suitable for electrical insulating applications.
Key Benefits
- One-part RTV formula—no mixing required.
- Designed for heat-resistant gasketing and sealing.
- Thixotropic paste helps control movement after dispensing.
Popular Applications
Sealing machined or cast flexible flanges in automotive repair, industrial maintenance and equipment assembly; corrosion-sensitive electrical assemblies where an insulating seal is needed. Test compatibility with the actual substrate and service conditions.
Product Specifications
| Chemistry / color | Silicone / copper-colored paste |
|---|---|
| Cure | Room-temperature, moisture initiated |
| Typical application temperature | Up to 350°C (662°F); validate service conditions |
| Tack-free time | 20–60 minutes at 22°C, 50±5% RH |
| Specific gravity | 1.05 at 22°C |
| Shore A hardness | 23–38 |
| Elongation / tensile strength | At least 350% / 1.4 MPa (205 psi) |
| Cured-property test conditions | 7 days at 25°C, 50±5% RH |
Application and Limitations
Degrease and clean mating surfaces. Assemble within minutes of dispensing. Allow adequate cure before heavy loads—Henkel gives seven days as an example. Not recommended for gasoline contact, oxygen-rich systems or strong oxidizers. Store sealed and dry, ideally at 8–21°C. Consult the package-specific safety sheet before use.
WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov.