LOCTITE 277 is a high-strength anaerobic adhesive specifically engineered for the permanent locking and sealing of threaded fasteners. This robust formulation cures reliably when confined in the absence of air between close-fitting metal surfaces. Consequently, it effectively prevents loosening and leakage caused by severe shock and vibration, ensuring long-term joint integrity in demanding industrial environments.
General Information of LOCTITE 277
LOCTITE 277 utilizes an advanced acrylic technology, specifically a dimethacrylate ester chemical type. It presents as a distinctive red liquid in its uncured state, offering clear visual identification. This product is a single-component system, meaning it requires no pre-mixing, which streamlines application and reduces potential for errors. Its anaerobic curing mechanism activates upon metal-to-metal contact and air exclusion, ensuring a reliable and consistent cure.
Furthermore, LOCTITE 277 is designed for high-strength applications, making it ideal for critical assemblies. It exhibits positive fluorescence under UV light, which aids in inspection and quality control processes post-application. The medium viscosity of this formulation allows for controlled dispensing, ensuring thorough thread coverage without excessive run-off. This combination of properties makes it a versatile solution for challenging threadlocking requirements.
Key Features & Technical Benefits
- Permanent Locking: This adhesive provides a robust, permanent bond for threaded assemblies, eliminating the need for mechanical locking devices. It ensures components remain securely fastened throughout their operational lifespan.
- High Strength: It delivers superior holding power, resisting extreme axial and radial loads. This high strength prevents fastener failure even under severe stress conditions.
- Anaerobic Curing: The product cures effectively when confined between metal surfaces, initiating polymerization in the absence of oxygen. This ensures a consistent and reliable cure within the thread engagement.
- Vibration & Shock Resistance: It actively prevents fastener loosening and leakage under dynamic stress, including intense vibration and sudden impacts. This significantly enhances the reliability of critical connections.
Typical Industrial Applications
This formulation is engineered for the following applications:
- Locking and sealing of large bolts (M25 and larger) in heavy machinery.
- Securing studs in engine blocks and transmission housings.
- Permanent assembly of critical threaded components exposed to high stress.
About Prostech
Prostech offers specialty materials (adhesives, tapes, thermal interface materials, insulating materials, sealants, PCB protection materials, …) along with manufacturing solutions. We proudly serve a wide range of industries and are an authorized distributor for leading global manufacturers of industrial materials and equipment. Our product range is designed to deliver customized solutions that address each customer’s unique needs.
With years of experience and a successful project history, we are confident in our ability to provide comprehensive material solutions. These solutions effectively tackle the challenges manufacturers face. To explore our full product catalog, simply click here. Our dedicated team is ready to assist with:
- Provide quotation, sample, TDS/MSDS, and technical consultation
- Testing sample quality and verifying product compatibility in our laboratory
- Customizing material formulas for special applications
- Adapting product sizes, quantities, and packaging to meet specific needs
- Offering expert advice on suitable equipment and automation processes
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Moreover, Prostech ensures the safe and accurate global delivery of all materials, including “dangerous goods”, in compliance with legal regulations. For personalized technical support or to receive a quotation, please contact us today.
| Property | Value |
| Technology | Acrylic |
| Chemical Type | Dimethacrylate ester |
| Appearance (uncured) | Red liquid |
| Components | One component - requires no mixing |
| Viscosity, Brookfield - RVT, 25 °C | 6,000 to 8,000 mPa·s (cP) |
| Cure | Anaerobic |
| Strength | High |
| Specific Gravity @ 25 °C | 1.12 |
| Breakaway Torque, M10 steel | 32 N·m (280 lb.in) |
| Compressive Shear Strength, Steel | ≥9 N/mm² (≥1,300 psi) |
