LOCTITE® NS 5540 Extreme Temperature Sealant
Features and Benefits
This 1-part, heat-cured liquid sealant is designed for threads and flanges. Ideal for high-temperature and high-pressure applications.
LOCTITE® NS 5540 is a brown, high-strength, heat-cured liquid sealant for threads and flanges in high-temperature and high-pressure applications. The cured product won’t permanently join flanges together, better enabling any future repairs of metal-to-metal joints, and performs well under thermal cycling conditions. It has a top service temperature of 700°C (1300°F) and has been successfully used to seal flanges carrying up to 2900 psi steam. Typical applications include the high-temperature thread and flange sealing against steam, oils, hot air, and exhaust gases.
- Repairable
- Low viscosity
- Chemically resistant
- Unaffected by thermal cycling
- Service/operating temperature: 38°C to 700°C (100°F to 1300°F)
- Seals flanges carrying up to 2,900 psi steam
Documents and Downloads
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Additional Documents
Technical Information
| Application temperature | -40.0 - 1300.0 °F (-40.0 - 704.0 °C ) |
| Applications | For high temperature applications |
| Colour | Brown |
| Cure type | Heat cure |
| Gap fill, Unprimed | 40.0 mm |
| Number of components | 1 part |
| Storage temperature | 8.0 - 21.0 °C |
| Viscosity | 48000.0 mPa·s (cP) |
LOCTITE® NS 5540
This 1-part, heat-cured liquid sealant is designed for threads and flanges. Ideal for high-temperature and high-pressure applications.
