Loctite 515 – Flange Sealant
Loctite 515 is a medium-strength anaerobic flange sealant specifically formulated for sealing rigid machined metal flanges and close-fitting metal-to-metal joints. It cures in the absence of air when confined between metal surfaces, forming a durable, flexible gasket that effectively prevents leaks of oils, coolants, fuels, hydraulic fluids, water, and many industrial chemicals. It is an ideal replacement for conventional pre-cut gaskets in industrial and automotive applications.
Loctite 515 is designed for use on rigid flanges made from aluminum, steel, and cast iron. Its thixotropic formulation prevents the sealant from running after application, ensuring clean and precise assembly. The sealant fills surface imperfections and machining marks, creating a reliable leak-proof seal while remaining flexible after curing to accommodate thermal expansion, contraction, and vibration.
Once cured, Loctite 515 provides excellent resistance to pressure, vibration, and temperature fluctuations, helping improve equipment reliability and reduce maintenance. It also protects flange surfaces from corrosion by sealing out moisture and contaminants, extending the service life of mechanical assemblies.
Key Features
- Medium-strength anaerobic flange sealant
- Designed for rigid machined metal flanges
- Forms a durable, flexible, leak-proof gasket
- Excellent resistance to oils, fuels, hydraulic fluids, coolants, water, and industrial chemicals
- Fills surface imperfections and machining marks
- Thixotropic formula prevents running after application
- Resists vibration, pressure, and thermal cycling
- Eliminates the need for conventional pre-cut gaskets
Typical Applications
- Engine and transmission housings
- Gearboxes and differential housings
- Pumps and compressors
- Hydraulic and pneumatic equipment
- Valve covers and flange assemblies
- Industrial machinery and processing equipment
- Automotive and heavy equipment maintenance
Benefits
- Prevents fluid leakage and contamination
- Improves equipment reliability and operational efficiency
- Reduces gasket inventory and assembly time
- Minimizes maintenance costs and unplanned downtime
- Provides long-lasting sealing performance in demanding industrial environments
Loctite 515 is a trusted flange sealing solution for manufacturers and maintenance professionals who require reliable sealing of rigid metal flanges, excellent chemical resistance, and durable long-term performance in industrial, automotive, and heavy-duty applications.
