LOCTITE 660 is a high-strength anaerobic retaining compound specifically designed for bonding cylindrical fitting parts. It effectively fills bond gaps up to 0.50 mm (0.02 in.). This product prevents loosening and leakage caused by shock and vibration. Consequently, it significantly extends the service life of industrial components.
General Information of LOCTITE 660
LOCTITE 660 utilizes advanced acrylic technology with a urethane methacrylate chemical base. It presents as a metallic gray paste, indicating its high viscosity. Furthermore, this is a one-component system, eliminating the need for mixing prior to application. The product cures anaerobically, meaning it hardens when confined between close-fitting metal surfaces in the absence of air. This unique curing mechanism ensures robust performance in demanding industrial environments. Activators can accelerate its cure speed when necessary.
Key Features & Technical Benefits
- Excellent Gap Cure: This formulation effectively restores correct fits on worn shafts and other components.
- High Strength Retention: It provides superior resistance against shock and vibration, securing assemblies reliably.
- Anaerobic Curing: The product cures in the absence of air, ensuring a strong bond on metal surfaces.
- Single Component System: It requires no mixing, simplifying application and reducing preparation time.
Typical Industrial Applications
This formulation is engineered for the following applications:
- Restoring correct fits on worn shafts.
- Securing spun bearings in their housings.
- Repairing damaged keyways in mechanical assemblies.
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 | Urethane methacrylate |
| Appearance (uncured) | Metallic gray paste |
| Components | One component - requires no mixing |
| Viscosity (Spindle TB, 0.5 rpm, Helipath) | 1,000,000 to 2,000,000 mPa·s (cP) |
| Viscosity (Spindle TB, 5.0 rpm, Helipath) | 150,000 to 350,000 mPa·s (cP) |
| Cure | Anaerobic |
| Strength | High |
| Specific Gravity @ 25 °C | 1.13 |
| Coefficient of Thermal Expansion, ISO 11359-2 | 80×10-6 K-1 |
| Coefficient of Thermal Conductivity, ISO 8302 | 0.1 W/(m·K) |
| Specific Heat | 0.3 kJ/(kg·K) |
| Elongation, at break, ISO 37 | <2 % |
| Compressive Shear Strength (Steel pins and collars, after 24h @ 22°C) | ≥17.2 N/mm² (2,490 psi) |
