Description
LOCTITE 266 is a high temperature, high strength, red-orange anaerobic threadlocker. It is a 1-part, thixotropic liquid that is fast curing and which resists oil and mild surface contamination at temperatures up to +232°C. Locks fasteners up to 20mm in diameter.
- Pack size: 50 ml tube (Loctite no. 1117533)
Application
- Particularly suitable for heavy duty applications such as bolts used in transmissions, construction equipment or railroad assemblies where resistance to heavy shock, vibration and stress level is required along with exposure to elevated temperatures.
Characteristics
- Locks fasteners up to 20 mm in diameter
- CFIA listed
- Resists oil and mild surface contamination at temperatures to +232 °C
Technical specifications
| Colour | Red-orange |
| Cure type | Activator cure, Anaerobic cure |
| Fixture time | 15 min |
| Physical form | Liquid |
| Viscosity, Brookfield – RVF, @ 25.0 °C Spindle 3, speed 2 rpm | 7000.0 – 11000.0 mPa·s (cP) |
| Viscosity, Brookfield – RVF, @ 25.0 °C Spindle 3, speed 20 rpm | 2500.0 – 5000.0 mPa·s (cP) |
| Fluorescence | Positive under UV light |
| Strength | High |
Hazard Information (CLP)

Signal word: Warning.
Hazard Statements (H-statements)
- H317: May cause allergic skin reactions.
- H319: Causes serious eye irritation.
- H335: May cause respiratory irritation.
- H412: Harmful to aquatic life with long lasting effects.
Precautionary Statements (P-statements)
Prevention:
- P273: Avoid release to the environment.
- P280: Wear protective gloves.
- P261: Avoid inhalation of vapors.
Response:
- P333+P313: If skin irritation or rash occurs: Get medical advice/attention.
- P337+P313: If eye irritation persists: Get medical advice/attention.
Additional Labeling (EUH-statements)
No relevant EUH-statements found.
Storage and Disposal
No specific storage or disposal instructions provided.
Other Relevant Information
This product does not contain substances classified as PBT, vPvB, or Endocrine Disruptors (ED).
Henkel AG & Co. KGaA, Henkelstr. 67, 40589 Düsseldorf, GERMANY, +49 211 7970, [email protected], www.henkel.com






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Very satisfied, better than expected. Better than anything I’ve tried so far. Super fast delivery, thank you.
daniela89 –
I noticed the difference right away! Packaging was slightly damaged, but product is excellent.
Scarlett R. –
This solved my problem completely! Easy to use, no mess at all. Packaging was slightly damaged, but product is excellent.
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Better than I thought; I’m satisfied. Fast and secure delivery.
manon_b –
Great product, worth every cent. Very fast delivery, thank you. I was skeptical, but now I’ll order it regularly.
arianna88 –
Perfect for my needs; I couldn’t be happier.
Antonio –
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alessia_roma –
I’ve been using it for 2 weeks and I already see results! Very effective, I noticed a change in just a week. Been using it for 2 weeks and already see results!
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anna.star –
Easy to use, without making a mess. Better than anything I’ve tried before. Packaging was slightly damaged, but product is excellent. Very satisfied, better than expected.
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The quality pleasantly surprised me.