Description
LOCTITE® 542 is designed for the locking and sealing of metal pipes and fittings as well as other cylindrical metal assemblies. The product cures when confined in the absence of air between close-fitting metal surfaces and prevents loosening and leakage due to shock and vibration. The thixotropic nature of LOCTITE 542 reduces the migration of liquid product after application to the part.
- Pack size: 250 ml bottle (Loctite no. 234405)
- Also available in: 10 ml bottle, 50 ml bottle
Application
- Ideal for fine threads as used in hydraulic, pneumatic & general fittings
Characteristics
- Instant low-pressure seal
- Suitable for metal threads only
- Resistant to fuel, oil, coolants and hydraulic fluids
- Locks connection against vibration loosening
- DVGW approval (EN 751-1): NG-5146AR0855
Technical specifications
| Agency Approvals / Specifications | DVGW, WRAS |
| Breakaway Torque, Steel M10 | 15.0 N·m (130.0 in./lb. ) |
| Colour | Brown |
| Operating Temperature | -55.0 – 150.0 °C (-65.0 – 300.0 °F ) |
| Viscosity, 20 RPM | 600.0 mPa·s (cP) |
Hazard Information (CLP)

Signal word: Warning
Hazard Statements (H-Sentences)
- H319: Causes serious eye irritation.
- H335: May cause respiratory irritation.
- H412: Harmful to aquatic life with long lasting effects.
Precautionary Statements (P-Sentences)
Prevention:
- P261: Avoid breathing vapor/aerosol.
- P273: Avoid release to the environment.
Response:
- P337+P313: If eye irritation persists: Get medical advice/attention.
Supplementary Information
Contains: Methyl methacrylate, may produce an allergic reaction.
Storage and Disposal
Dispose of contents/container in accordance with national regulations.
Henkel AG & Co. KGaA, Henkelstr. 67, 40589 Düsseldorf, GERMANY, +49 211 7970, [email protected], www.henkel.com






Laura –
The quality pleasantly surprised me. Easy to use, no mess at all.
Louis –
Fits perfectly. Satisfied with the quality. Great item.
Fiona –
Not too big, not too small, perfect. The quality pleasantly surprised me.
Hunter –
Price matches the quality. Everything perfect and fast. Arrived as promised.
Emilia –
Packaging was slightly damaged, but product is excellent. Better than anything else I’ve tried before. Not too big, not too small, just perfect.
ellie.love –
The quality pleasantly surprised me. I’ve been using it for 2 weeks and I already see results!
Sophia O. –
I’ve been using it for 2 weeks and I already see results! Perfect for my needs; I couldn’t be happier.
delphine_s –
Very effective, I noticed a change in just a week. No unpleasant smell; I really like that.