LOCTITE® NS 5540 Extreme Temperature Sealant
Features and Benefits
LOCTITE® NS 5540 is a thermally reactive, heat-cured, liquid sealant for threads and flanges used in high temperature and high pressure applications.
LOCTITE® NS 5540 is a brown, high strength, thermally reactive, heat-cured, liquid sealant for threads and flanges that is used in high temperature and high pressure applications. It will not cement flanges together thus allowing future repairs of metal-to-metal joints and is unaffected by thermal cycling. It has been successfully used to seal flanges carrying up to 2900 psi steam.
- One component
- Low viscosity
- Chemical resistant
- Unaffected by thermal cycling
- Service temperature is +100 °F to +1,300 °F (+38 °C to +700˚C)
- Seals flanges carrying up to 2,900 psi steam
- High strength
Documents and Downloads
Looking for a TDS or SDS in another language?
Technical Information
| Application temperature | -40.0 - 1300.0 °F (-40.0 - 704.0 °C ) |
| Applications | For high temperature applications |
| Color | 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
LOCTITE® NS 5540 is a thermally reactive, heat-cured, liquid sealant for threads and flanges used in high temperature and high pressure applications.