A 1-part, high-strength, general purpose, anaerobic-curing retaining compound designed for bonding cylindrical fitting parts.
To lock bushings and sleeves in housings on shafts, augment press fits, or to bond any close-fitting cylindrical parts, LOCTITE 609 is a good choice. The green, high-strength, anaerobic-curing retaining compound cures in the absence of air between close fitting metal surfaces, providing a high-strength and corrosion-free bond. Typical applications include rotor to shafts in fractional and subfractional horsepower motors.
- Low viscosity
- Augments press fits
- Fluorescent under UV for quality control
- Operating temperature: -55°C to 150°C (-65°F to 300°F)

LOCTITE 609 is
a green, low-viscosity, anaerobic retaining compound designed specifically for bonding cylindrical metal assemblies. It cures quickly in the absence of air when confined between close-fitting metal surfaces. This adhesive prevents loosening, leakage, and fretting corrosion caused by heavy vibration and thermal cycling.
Key Technical Specifications
- Primary Function: Securing non-threaded cylindrical joints like bearings, bushings, rotors, and sleeves.
- Viscosity: Low viscosity liquid.
- Strength: High to medium shear strength (adds up to 3,000 psi holding power).
- Maximum Gap Fill: Up to 0.13 mm (0.005 inches) in diameter.
- Cure Time: Fixes within 10 minutes; achieves full structural strength in 24 hours.
- Temperature Resistance: -54°C to 150°C (-65°F to 300°F).
- Compliance: Meets military specification MIL-R-46082B for aerospace and industrial designs.
Common Applications
- Augmenting press-fit and slip-fit mechanical assemblies.
- Retaining bearings securely onto shafts or inside gear housings.
- Bonding rotors to shafts in fractional horsepower motors.
- Joining dissimilar metals safely without galvanic reactions.
Usage Tips & Disassembly
- Surface Prep: Clean metal surfaces thoroughly with a solvent like acetone or isopropyl alcohol before application.
- Application: Apply a continuous bead around the leading edge of the male part. Rotate the parts slightly during assembly to ensure even distribution.
- Dismantling: Parts can be separated using standard workshop equipment like manual presses or gear pullers. If the bond refuses to release, localized heating above 150°C (300°F) will temporarily soften the compound for easier removal.