Product details
| Grade | Loctite 609 |
| Strength | High strength |
| Colour | Green |
| Family | Retaining compounds |
| Brand | Loctite (Henkel) |
| Stock | Held in Dubai — buy one or bulk |
Pack sizes
Prices on request. Tell us the quantity you need.
Check stockWhat Loctite 609 is for
The general-purpose retaining compound and the quickest to handling strength in the family — ≥10.3 N/mm² after one hour, rising to ≥15.8 N/mm² at 24 hours. Low viscosity at 110–140 mPa·s, so it flows into close cylindrical fits. Henkel names rotors onto shafts in fractional horsepower motors, locking bushings and sleeves into housings, and augmenting press fits.
Key features
- Fast — ≥10.3 N/mm² in the first hour
- ≥15.8 N/mm² after 24 hours
- Low viscosity, 110–140 mPa·s, for close fits
- Tested to the lot requirements of Mil-R-46082B (a regional approval)
- Each North American lot tested to ASTM D5363
- Full strength retained in motor oil at 125°C, petrol, brake fluid and ethanol
- Elongation at break under 2% — a rigid bond
Typical applications
- Cylindrical assemblies
- Keys and splines
Technical data
Uncured material
| Technology | Acrylic |
| Chemical type | Methacrylate ester |
| Appearance | Green liquid |
| Fluorescence | Positive under UV light |
| Components | One component — no mixing |
| Cure | Anaerobic; secondary cure by activator |
| Viscosity, Cannon Fenske (ISO 3104) | 110–140 mPa·s |
| Viscosity class | Low |
| Specific gravity at 25°C | 1.1 |
Strength
Steel pins and collars at 22°C. Cure graphs cover gaps of 0.05, 0.15 and 0.2 mm.
| Compressive shear strength after 1 h (ISO 10123) | ≥10.3 N/mm² (≥1,490 psi) |
| Compressive shear strength after 24 h (ISO 10123) | ≥15.8 N/mm² (≥2,290 psi) |
| Elongation at break (ISO 37) | <2% |
| Hot strength plotted to | 200°C |
| Heat ageing data published at | 120°C and 150°C |
Chemical resistance
As a percentage of initial strength after ageing.
| Environment | °C | 100 h | 500 h | 1,000 h |
|---|
| Motor oil (MIL-L-46152) | 125 | 100% | 100% | 100% |
| Unleaded petrol | 22 | 100% | 100% | 100% |
| Brake fluid | 22 | 100% | 100% | 100% |
| Ethanol | 22 | 100% | 100% | 100% |
| Acetone | 22 | 100% | 100% | 85% |
| Water / glycol 50:50 | 87 | 100% | 85% | 80% |
Cured material
| Coefficient of thermal expansion (ISO 11359-2) | 80 × 10⁻⁶ K⁻¹ |
| Thermal conductivity (ISO 8302) | 0.1 W/(m·K) |
| Specific heat | 0.3 kJ/(kg·K) |
How to use it
- Clean all surfaces, external and internal, with a Loctite cleaning solvent and allow to dry.
- Shake the product thoroughly before use.
- On inactive metals, or where large gaps are present, use an activator and allow to dry.
- Slip fits: apply around the leading edge of the male part and the inside of the female part, and use a rotating motion during assembly to spread it.
- Press fits: apply thoroughly to both surfaces and assemble at high press-on rates.
- Shrink fits: coat to a smooth even film. Heating the female part — coat the male. Cooling the male part — coat the female. Doing both — apply to the cooled part, and avoid condensation on it.
- Shrink fits: coat the pin, then heat the collar to create enough clearance for free assembly.
- Do not disturb the parts until handling strength is reached.
Handling and storage
- Not recommended for pure oxygen or oxygen-rich systems.
- Not a sealant for chlorine or other strong oxidising materials.
- Not normally recommended on plastics — thermoplastics can stress-crack.
- Disassembly: hand tools first; if needed apply localised heat to about 250°C and take apart while hot. If that temperature is not possible, heat as far as you can and use mechanical aids.
- Store unopened and dry, ideally 8°C to 21°C; outside 8–28°C the properties can be affected.
- Do not return decanted product to the original container.
The full retaining compound range
Pick by gap first, then strength. Tight fits: 609 (fastest, ≥15.8 N/mm²), 601 (≥15), 603 (≥22.5, for surfaces you cannot clean). Stronger on a close fit: 648 at 31 N/mm², or 680 at 28 on stainless with NSF 61. Worn fit to 0.25 mm: 638 at 29 N/mm². Badly worn to 0.5 mm: 660. Hot assembly: 620. Must come apart again: 641.
Always read the current technical and safety data before use —
ask us and we'll send it with your quotation.
