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Henkel LOCTITE 510 High Temperature Flange Sealant for Rigid Metal Flanges
Low viscosity
Certified by the ANSI/NSF 61 standard and can be used in commercial and residential drinking water systems with temperatures not exceeding +182 °C
Cures when isolated from air between closely fitting metal surfaces
Tolerates slight surface contamination caused by various oils
Provides high-temperature resistance and oil resistance
Provides solid curing performance
LOCTITE 510 High Temperature Flange Sealant for Rigid Metal Assemblies
Designed for machined aluminum and steel flanges, LOCTITE 510 High Temperature Flange Sealant creates a durable seal without requiring a pre-cut gasket. The product adapts to flange geometry and fills gaps up to 0.25 mm on unprimed surfaces, helping reduce leakage paths around bolt holes, machined faces, and small surface imperfections. Its anaerobic cure technology allows exposed material to remain uncured while the confined product polymerizes between the assembled metal surfaces.
The cured gasket supports reliable sealing in applications exposed to oils, fuels, hydraulic fluids, process chemicals, and elevated operating temperatures, subject to application-specific testing. It also helps improve torque transmission across the assembled flange because the cured material eliminates the compressible layer associated with many traditional solid gaskets. The official operating range is approximately -55°C to 200°C, while Henkel lists temperature resistance up to 204°C for suitable applications.
Applications of LOCTITE 510 High Temperature Flange Sealant
Typical uses include transmission housings, motor casings, gearboxes, pumps, compressors, industrial machinery, fluid-processing equipment, power-generation systems, and other rigid flange assemblies. The product is especially useful for maintenance and repair operations where replacing multiple gasket shapes creates storage, purchasing, and downtime challenges.
Its medium-strength performance allows secure sealing while supporting planned disassembly with standard hand tools. LOCTITE 510 High Temperature Flange Sealant can be applied manually, through dispensing equipment, by screen printing, or by roller on larger flange surfaces. These options make it suitable for both field repairs and repeatable production processes.
Key Benefits of LOCTITE 510 High Temperature Flange Sealant
- One-part formula: No measuring or mixing is required before application.
- High-temperature resistance: Suitable for demanding industrial equipment and machinery.
- Chemical resistance: Creates a durable cured gasket for industrial operating fluids.
- Gap-filling performance: Fills gaps and surface irregularities up to 0.25 mm.
- Thixotropic consistency: Supports accurate application without uncontrolled flowing.
- Immediate sealing: Forms an instant low-pressure seal after flange assembly.
- Metal compatibility: Recommended for machined aluminum and steel surfaces.
- NSF registration: Registered under NSF Category P1 for applicable processing areas.
How to Apply LOCTITE 510 High Temperature Flange Sealant
Remove old gasket material, burrs, oil, grease, dust, and contamination before application. Henkel recommends cleaning flange surfaces with a suitable LOCTITE cleaner such as SF 7070. Where cure speed is slow because of passive metals or temperatures below 5°C, LOCTITE SF 7649 activator may be used according to current technical instructions.
Apply a continuous bead to one flange, keeping the material close to the inner rim and surrounding all bolt holes. Assemble the parts promptly and tighten the fasteners to the specified torque. Excess sealant outside the joint can be wiped away because exposed material will not cure in air. Validate bead size, flange gap, bolt pattern, surface finish, cure time, and fluid compatibility before full production.
Official LOCTITE 510 High Temperature Flange Sealant Resources
Review the official Henkel LOCTITE 510 product page and the official LOCTITE 510 technical data sheet for current specifications, safety documents, packaging, and application guidance.
Explore our anaerobic flange sealants for more rigid-flange gasketing solutions, or browse our industrial gasket sealants for additional high-temperature and chemical-resistant products. LOCTITE 510 is commonly available in 50 ml and 250 ml packages, subject to regional availability. Contact our sales team for quotations, bulk quantities, export documentation, technical support, and compatible cleaners or activators.
