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 1,300°F (700˚°C) and has been successfully used to seal flanges carrying up to 2900 psi steam. Typical applications include high-temperature thread and flange sealing of steam, oils, hot air, and exhaust gases.
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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)