Henkel LOCTITE 272 High Temperature Threadlocker for Large Bolts and Studs

LOCTITE 272 High Temperature Threadlocker Performance

Henkel designed LOCTITE 272 for threaded assemblies that require dependable retention at temperatures higher than those handled by many standard threadlockers. The official product information lists resistance up to 232°C, making it suitable for validated assemblies exposed to sustained heat or repeated thermal cycling. Its thixotropic behavior limits migration after application, while the medium viscosity helps the liquid wet and fill larger threaded interfaces.

The uncured product is a red-orange dimethacrylate ester with a typical specific gravity of 1.11. Published Brookfield viscosity ranges from approximately 4,000 to 15,000 mPa·s at 25°C under the specified test condition. Because it is supplied as a single component, operators do not need to measure or mix separate materials, reducing preparation time and avoiding ratio errors during maintenance or production.

Permanent Locking for Large Bolts and Studs

Typical applications include large bolts and studs, with Henkel specifically referencing M25 and larger fasteners. The adhesive can be used in heavy machinery, power-generation equipment, industrial engines, gearboxes, pumps, compressors, exhaust assemblies, mining equipment, and other systems where mechanical locking devices may loosen under vibration or heat. The product also seals threaded paths, helping prevent leakage and corrosion through the assembled threads.

After 24 hours at 22°C, the technical data sheet reports a typical breakaway torque of 23 N·m and prevailing torque of 25 N·m on M10 steel nuts and bolts tested according to ISO 10964. Compressive shear strength on steel pins and collars is listed at not less than 14.5 N/mm². These laboratory values provide useful process references, but final performance depends on fastener size, material, finish, thread condition, engagement length, cure temperature, and service exposure.

7 Benefits of LOCTITE 272 High Temperature Threadlocker

• High-temperature resistance: Suitable for validated service conditions up to 232°C.
• High locking strength: Supports permanent retention of large threaded fasteners.
• Shock and vibration resistance: Helps prevent loosening during demanding operation.
• Thread sealing: Fills threaded voids and helps reduce leakage through fasteners.
• One-component processing: Requires no weighing, mixing, or separate hardener.
• Thixotropic flow: Reduces unwanted migration after application.
• Industrial durability: Resists selected oils, fuels, water, solvents, and process fluids after proper curing.

Applying LOCTITE 272 High Temperature Threadlocker

Clean all external and internal threads and allow them to dry before application. For through holes, apply several drops to the bolt at the nut-engagement area. For blind holes, place the product into the internal threads near the bottom so displaced air does not prevent complete coverage. For sealing applications, apply a continuous 360-degree bead to the leading male threads while leaving the first thread free, then assemble and tighten as required.

Cure speed depends on the metal substrate, temperature, thread gap, and surface treatment. Passive metals, low temperatures, or larger gaps may require LOCTITE SF 7471 or SF 7649 Activator after process validation. The official product page lists a fixture time of approximately 40 minutes, while full performance develops progressively. Do not disturb or heavily load the assembly before adequate cure has been achieved.

Removal, Storage, and Official Resources

Because LOCTITE 272 High Temperature Threadlocker is a permanent high-strength grade, normal hand tools may not be sufficient for disassembly. Henkel recommends applying localized heat to the nut or bolt to approximately 250°C and separating the fastener while it remains hot. Follow safe heating procedures and consider nearby components, coatings, seals, and combustible materials.

Store unopened containers in a dry location, ideally between 8°C and 21°C. The product is not recommended for pure oxygen, oxygen-rich systems, chlorine, or other strong oxidizing materials. Compatibility testing is also necessary before use on thermoplastics because stress cracking may occur with certain plastic materials.

Review the official Henkel LOCTITE 272 product page and the official LOCTITE 272 technical data sheet for current specifications, application instructions, safety information, and regional packaging.

Explore our high-strength threadlockers for additional permanent fastener-locking products. Browse our high-temperature anaerobic adhesives for threaded, cylindrical, and flange assemblies. Contact our sales team for quotations, package availability, technical documents, bulk orders, and export support.