Loxeal 55-03 Medium Strength Anaerobic Threadlocker
Loxeal 55-03 is a medium strength anaerobic threadlocker for nuts and bolts of all types that may need to be dismantled later. It tolerates minor oil contamination on parts, so it performs even on as-received fasteners, and it holds its locking and sealing properties from -55°C to +200°C (up to +250°C for short periods). The direct alternative to Loctite 243.
Why choose Loxeal 55-03
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Oil tolerant: cures reliably on lightly oiled threads without extensive cleaning.
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High temperature: proven unscrewing resistance at +200°C.
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Serviceable strength: locks firmly against vibration yet can be dismantled with hand tools.
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Wide chemical compatibility: resists water, gas, oils, gasoline, brake fluid, ethanol, biodiesel and many chemicals.
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Blue colour, fluorescent under blue light for easy inspection.
Certified and approved
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Gas: approved as gas-tight sealant for threaded fittings to EN 751-1 (DVGW and Gaz de France).
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Potable water: WRAS approved and compliant with the German UBA declaration for drinking water use.
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Food areas: NSF registered category S4 for use as an adhesive in and around food processing areas.
Typical applications
- Locking machine bolts, pump housings, gearbox fasteners and automotive nuts and bolts subject to vibration.
- Threaded fittings in gas and potable water systems where certified products are required.
- Maintenance work on equipment where fasteners arrive lightly oiled.
How to use
- Clean and degrease parts where practical (Loxeal Cleaner 10 recommended); minor oil films are tolerated.
- Apply enough product to completely fill the engaged threads.
- Assemble the parts and hold for the curing time.
- On passive surfaces or in cold conditions, Loxeal Activator 11 speeds curing (may slightly reduce final strength).
Cure times at +25°C
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Handling: 10 to 20 minutes
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Functional: 1 to 3 hours
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Full cure: 24 to 36 hours depending on substrate, gap and temperature
Specifications
| Chemistry |
Anaerobic methacrylate resin |
| Colour |
Blue (fluorescent under blue light) |
| Strength grade |
Medium (dismantlable) |
| Viscosity at +25°C |
1,700 to 9,000 mPa·s, thixotropic |
| Specific gravity |
Approx. 1.07 g/ml |
| Friction coefficient |
Approx. 0.10 |
| Max thread / gap filling |
M36 / 0.25 mm |
| Shear strength |
9 to 13 N/mm² (ISO 10123) |
| Breakaway torque |
18 to 23 N·m (ISO 10964) |
| Prevailing torque |
9 to 16 N·m (ISO 10964) |
| Service temperature |
-55°C to +200°C (+250°C short term) |
| Approvals |
EN 751-1 (DVGW, Gaz de France), WRAS, UBA, NSF S4 |
| Shelf life |
1 year in unopened packaging at up to +25°C |
Chemical resistance
Excellent long-term resistance to motor oil and gearbox oil at +125°C, ethanol and biodiesel at room temperature; excellent to good resistance to gasoline, brake fluid and 50 percent water glycol.
Important notes
- For metal fasteners. Liquid product can damage coatings, some plastics and elastomers; stress cracking may develop with some thermoplastics.
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Not approved for pure oxygen or oxygen-rich systems, and not suitable as a sealant for chlorine or other strong oxidising agents.
- For disassembly use normal tools; if needed heat parts to +150°C to +250°C, remove cured residue mechanically and clean with acetone.
- Store cool and dry at or below +25°C. Do not return used product to the bottle.
Safety
Consult the Safety Data Sheet before use. For professional and industrial use. Follow all handling instructions on the product label.
All technical information is provided as a guide only. Always verify suitability with your specific materials and operating conditions before use.
