Description
LOCTITE® 511 is a white to off-white, low strength, general purpose, thixotropic methacrylate thread sealant. It cures in the absence of air and by contact with metals when confined within threads up to M80/R3”. It is suitable for all metal fittings and its breakaway torque rating is 6 Nm. Viscosity is 9,000 – 22,000 mPa·s and service temperature -55 to +150ºC. DVGW approved.
- Pack size: 50 ml bottle (Loctite no. 234257)
- Also available in: 50 ml tube, 250 ml tube
Application
- LOCTITE® 511™ is designed for the locking and sealing of metal threaded pipes and fittings.
- The product cures rapidly when confined in the absence of air between close fitting metal surfaces.
Characteristics
- Doesn’t creep, shrink or block systems
- Provides an instant low pressure seal
- Single component – clean and easy to apply
- Thixotropic, medium to high viscosity
- Suitable for all metal fittings up to M80/R3”
- DVGW approved
Technical specifications
| Agency Approvals / Specifications | DVGW |
| Chemical Basis / Base | Methacrylate |
| Colour | White: Off White |
| Key Characteristics | Disassembly: Easy Disassembly, Thixotropic |
| Viscosity, Brookfield – RVT, @ 25.0 °C Spindle 6, speed 2.5 rpm | 40000.0 – 100000.0 mPa·s (cP) |
| Viscosity, Brookfield – RVT, @ 25.0 °C Spindle 6, speed 20 rpm | 9000.0 – 22000.0 mPa·s (cP) |
Hazard Information (CLP)

Signal word: Warning.
Hazard Statements (H-codes)
- H315: Causes skin irritation.
- H317: May cause an allergic skin reaction.
- H319: Causes serious eye irritation.
- H335: May cause respiratory irritation.
- H412: Harmful to aquatic life with long lasting effects.
Precautionary Statements (P-codes)
Prevention:
- P280: Wear protective gloves.
- P273: Avoid release to the environment.
- P261: Avoid breathing vapors.
Response:
- P302+P352: IF ON SKIN: Wash with plenty of soap and water.
- P333+P313: If skin irritation or rash occurs: Get medical advice/attention.
- P337+P313: If eye irritation persists: Get medical advice/attention.
For consumer use only:
- P101: If medical advice is needed, have product container or label at hand.
- P102: Keep out of reach of children.
- P501: Dispose of contents/container in accordance with national regulation.
Additional Information
- None if used properly.
- Contains no substances classified as PBT, vPvB, or endocrine disruptors.
Henkel AG & Co. KGaA, Henkelstr. 67, 40589 Düsseldorf, GERMANY, +49 211 7970, [email protected], www.henkel.com






Fabio –
Fast shipping, perfect product. Better than I thought; I’m satisfied. Works perfectly.
Amélie N. –
I’ve been using it for 2 weeks and I already see results! A friend recommended it to me and I’m thrilled with the purchase. A friend recommended it and I’m so glad I ordered. I was skeptical, but now I’ll order regularly.
lucy_sun –
The quality pleasantly surprised me. Not too big, not too small, perfect. Perfect for my needs; I’m very satisfied. Perfect for my needs; I couldn’t be happier.
florence88 –
Looks even nicer in person. Perfect for my needs; I couldn’t be happier.
Greta –
Very effective, I noticed a change in just a week.
Gabriel –
Very durable. Good quality at a fair price. No complaints so far. Excellent-quality product.