Loctite 635 Retaining Compound 250ml
Available
Loctite 635 is a green, opaque, one-component anaerobic retaining compound. It is a dimethacrylate ester with a high strength class and a medium viscosity, and it fluoresces under UV light.
It suits bonding rotors on shafts in fractional-horsepower motors, locking bushings and sleeves, and augmenting press fits. Activator 7471 or 7649 is the secondary cure on inactive metals, or where cure is slow or gaps are large.
Where this product is used
- Bonding rotors on shafts in fractional-horsepower motors
- Locking bushings and sleeves
- Augmenting press fits
- Assemblies on inactive metals, with Activator 7471 or 7649
Features
- High strength class
- One component, no mixing
- Green, opaque liquid that fluoresces under UV light
- Medium viscosity: 1,500 to 2,500 mPa·s
- Anaerobic cure, with activator as the secondary cure
- At least 13.8 N/mm² after 30 minutes at 22 °C with Activator 7471 on one side
- Tested to Mil-R-46082B lot requirements (regional approval)
Key specifications
| Specification | Detail |
|---|---|
| Brand | Loctite |
| Chemical type | Dimethacrylate ester (acrylic) |
| Colour | Green, opaque liquid; fluoresces under UV |
| Cure | Anaerobic, one component; Activator 7471 or 7649 as secondary cure |
| Strength class | High |
| Viscosity (Brookfield RVT, 25 °C, spindle 3, 20rpm) | 1,500 to 2,500 mPa·s |
| Specific gravity (25 °C) | 1.1 |
| Compressive shear, 24 h at 22 °C (ISO 10123, steel pins and collars) | At least 20 N/mm² |
| Compressive shear, 30 min at 22 °C, Activator 7471 on one side | At least 13.8 N/mm² |
| Compressive shear, 1 h at 93 °C, tested at 22 °C | At least 31 N/mm² |
| Compressive shear, 1 h at 93 °C then 1 h at 149 °C, tested at 149 °C | At least 9.6 N/mm² |
| Disassembly | Local heat to about 250 °C, disassemble while hot |
| Approvals | Mil-R-46082B lot requirements (regional approval); ASTM D5363 for North American lots |
| Storage | Unopened, dry; optimal 8 °C to 21 °C |
Choosing the right option
Loctite 635 is a high strength retaining compound of medium viscosity. For other retaining compounds see Loctite 638 Retaining Compound 50ml, Loctite 609 Cylindrical Bonding Retaining Compound and Loctite 680 High Strength Retaining Compound 50ml. It is a retaining compound for cylindrical parts, not a threadlocker.
See also: Loctite 638 Retaining Compound 50ml, Loctite 609 Cylindrical Bonding Retaining Compound, Loctite 680 High Strength Retaining Compound 50ml, Loctite 7471 Primer T Surface Preparation Activator Aerosol 133g.
| Option | Part number | SKU |
|---|---|---|
| 50 ml | 635-50ML-LOC | A0049791 |
| 250 ml | 635-250ML-LOC | A0049792 |
Using it
Use Activator 7471 or 7649 on inactive metals, where cure is slow, or where gaps are large.
Cure speed depends on the materials, the gap and the temperature. Do not disturb the parts until sufficient handling strength is achieved.
Hot strength is charted from 0 to 150 °C, and heat ageing at 120, 150 and 180 °C.
To disassemble, apply local heat to about 250 °C and separate the parts while hot.
It is not recommended on plastics, so test first.
Storage and handling
Store unopened in a dry location, with optimal storage at 8 °C to 21 °C. Storage below 8 °C or above 28 °C can affect properties.
Limits and safety
Not normally recommended for plastics. Not recommended for pure oxygen or oxygen-rich systems, or as a sealant for chlorine or strong oxidising materials.
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Loctite 635 Retaining Compound: 250 ml
SKU: A0049792 | Model: 635-250ML-LOC
Loctite 635 retaining compound, 250ml. At least 20 N/mm² compressive shear on steel after 24 h at 22 °C.