Loctite NS 5540 – High-Temperature Sealing Liquid (1 Pint Brush Top Can)
Loctite NS 5540 – High-Temperature Sealing Liquid (1 Pint Brush Top Can)
Short Overview
Loctite NS 5540 is a high-temperature, thermally reactive sealing liquid engineered for metal-to-metal flange sealing in extreme heat and pressure environments. Supplied in a 1-pint brush-top can, this brown liquid gasket sealant delivers reliable leak prevention at operating temperatures up to 1500°F (815°C) and pressures up to 2900 psi, making it ideal for industrial, power generation, and heavy equipment applications.
Key Features
Thermally reactive liquid gasket sealant for extreme environments
Withstands temperatures up to 1500°F (815°C)
Pressure resistance up to 2900 psi (200 bar)
Excellent adhesion to metal substrates
Brushable liquid for thin, uniform application
Allows future disassembly for maintenance and repairs
One-hour cure time for efficient downtime reduction
Designed for high-pressure steam, gas, and process fluids
Loctite NS 5540 is a high-performance, thermally activated sealing liquid designed to prevent leaks in high-temperature and high-pressure metal flange assemblies. When exposed to heat, the product cures to form a durable mechanical seal that resists thermal cycling, vibration, and aggressive industrial environments.
The liquid formulation allows easy brushing onto rigid metal flanges, fittings, and gasket surfaces, ensuring complete coverage even on complex geometries. Loctite NS 5540 is widely used in power plants, refineries, steel mills, pulp and paper facilities, and other heavy industries where steam, hydrocarbons, gases, and process fluids are present.
Unlike conventional gasket sealants, Loctite NS 5540 is engineered to maintain sealing integrity while still allowing components to be disassembled during scheduled maintenance, extending equipment life and reducing repair costs.
Uses of the Product
High-temperature metal flange sealing
Steam, gas, and hydrocarbon sealing
Gasket dressing to extend gasket life
Leak prevention in heat-exposed joints
Industrial MRO and plant maintenance
Applications
Power Generation Facilities
Oil & Gas Refineries
Steel Mills & Foundries
Pulp & Paper Plants
Industrial Boilers & Heat Exchangers
Pumps, Turbines, and Exhaust Systems
Technical Specifications
| Property | Value | Notes |
|---|---|---|
| Brand | Loctite | – |
| Product Number | NS 5540 | – |
| Chemical Base | Thermally Reactive | – |
| Product Form | Liquid | Brushable |
| Color | Brown | – |
| Package Size | 1 Pint | Brush-Top Can |
| Cure Time | 1 hour | – |
| Maximum Operating Temperature | 1500°F (815°C) | – |
| Minimum Operating Temperature | 59°F (15°C) | – |
| Pressure Resistance | 2900 psi (200 bar) | – |
| Viscosity | 48,450 mPa·s | – |
| Material Compatibility | Metal | – |
| Storage Temperature | 59°F to 86°F | Recommended |
| Packaging | 1 pint per inner | 12 per case |
Why Buy From Maisam Dubai
Reliable sourcing of industrial sealants and adhesives
Products suitable for extreme temperature and pressure applications
Support for industrial, energy, and maintenance sectors
Bulk and project-based supply capability
Trusted supplier across GCC markets
FAQs
Q1. What is Loctite NS 5540 used for?
It is used for sealing metal flanges and fittings exposed to high temperatures and pressures.
Q2. What is the maximum temperature resistance?
Loctite NS 5540 withstands temperatures up to 1500°F (815°C).
Q3. How much pressure can it handle?
It can seal applications up to 2900 psi (200 bar).
Q4. What materials does it bond to?
It is designed specifically for metal-to-metal applications.
Q5. Can assemblies be disassembled later?
Yes, it allows for disassembly during future maintenance.
Q6. How long does it take to cure?
Typical cure time is 1 hour.
Call to Action
Looking for Loctite NS 5540 High-Temperature Sealing Liquid for industrial or MRO applications?
📞 Phone: +971 52 167 2252
📩 Email: sales@maisamdubai.com
🌍 Serving: UAE, Saudi Arabia, Oman, Qatar, Bahrain, Kuwait
