Description
LOCTITE® 649 is a green, anaerobic, low viscosity, high strength, methacrylate retaining compound whose safety-conscious formula contains no acrylic acid. Fixture time on steel is 10 min and maximum diametrical clearance is 0.1 mm. Service temperature is -55 to +175ºC. Fluorescence allows product presence to be monitored.
- Volume: 250 ml bottle (Loctite no. 234892)
- Also available in: 50 ml bottle
Application
- LOCTITE® 649™ cures when confined in the absence of air between close fitting metal surfaces.
- Typical applications include bonding of cylindrical fitting parts, particularly where low viscosity is required.
Characteristics
- 1-part product, requires no mixing
- Low viscosity, small gap filling
- Contains no acrylic acid
- High strength
- Fluoresces for presence monitoring
Technical specifications
| Chemical Basis / Base | Methacrylate |
| Colour | Green |
| Diametrical Clearance | <0.1 mm |
| Fixture Time | 10.0 min. |
| Shear Strength | 15.0 N/mm² |
| Substrates | Metal: Steel |
| Viscosity, Brookfield – RVT, @ 25.0 °C Spindle 2, speed 20 rpm | 550.0 – 950.0 mPa·s (cP) |
Hazard Information (CLP)

Signal word: Warning.
Hazard Statements
- H317: May cause an allergic skin reaction.
- H319: Causes serious eye irritation.
- H335: May cause respiratory irritation.
Precautionary Statements
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 waste and residues in accordance with local authority requirements.
Prevention:
- P261: Avoid breathing vapors.
- P280: Wear protective gloves.
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
No additional information.
Storage and Disposal
- No special requirements when used properly.
Henkel AG & Co. KGaA, Henkelstr. 67, 40589 Düsseldorf, GERMANY, +49 211 7970, [email protected], www.henkel.com






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Perfect from start to finish.