LOCTITE 241 is an anaerobic threadlocker specifically engineered for securing and sealing threaded fasteners. It prevents loosening and leakage caused by shock and vibration. This formulation ensures reliable performance in demanding industrial environments, facilitating normal disassembly with standard hand tools.
General Information of LOCTITE 241
This product utilizes advanced acrylic technology, based on a methacrylate ester chemical type. It presents as a distinctive blue opaque liquid in its uncured state, exhibiting positive fluorescence under UV light. LOCTITE 241 is a one-component system, requiring no pre-mixing, which significantly simplifies application processes and reduces potential errors. Furthermore, it cures anaerobically when confined between close-fitting metal surfaces in the absence of air. This curing mechanism ensures a robust bond without external activators, though secondary activators can accelerate the process. This medium-strength adhesive is particularly effective on less active substrates, including stainless steel and plated surfaces, where routine servicing necessitates disassembly. Consequently, it offers broad utility across various industrial applications.
Key Features & Technical Benefits
- Medium Strength Formulation: This characteristic allows for normal disassembly of threaded fasteners using standard hand tools. Maintenance and repair operations become straightforward, minimizing downtime.
- Anaerobic Curing Mechanism: The product cures reliably when confined between metal surfaces, ensuring a secure lock. This process eliminates the need for oxygen, making it ideal for internal thread applications.
- Vibration and Shock Resistance: It effectively prevents fasteners from loosening due to dynamic stresses and operational vibrations. This enhances the long-term integrity and safety of mechanical assemblies.
- Versatile Substrate Compatibility: LOCTITE 241 performs well on various metals, including less active materials like stainless steel and plated surfaces. This broad compatibility expands its applicability across diverse manufacturing sectors.
- Single Component System: The ready-to-use formulation eliminates mixing, streamlining application and reducing material waste. This contributes to operational efficiency.
Typical Industrial Applications
This formulation is engineered for the following applications:
- Locking and sealing threaded fasteners in general industrial machinery
- Preventing leakage in assembled components within automotive and electronics sectors
- Securing bolts and nuts requiring routine maintenance disassembly, such as pump housings or gearboxes
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
- Delivering technical training and on-site support for optimal product use
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 | Methacrylate ester |
| Appearance (uncured) | Blue opaque liquid |
| Cure Type | Anaerobic |
| Strength | Medium |
| Specific Gravity @ 25 °C | 1.06 |
| Flash Point | >93 °C |
| Viscosity @ 25°C (Cannon Fenske #300) | 110 to 150 mPa·s (cP) |
| Breakaway Torque (M10 steel, 24h @ 22°C) | 11.5 N·m |
| Prevail Torque (M10 steel, 24h @ 22°C) | 10 N·m |
| Static Shear Strength (Steel, 24h @ 22°C) | 10 MPa |




