Description
LOCTITE® 549 is an orange, medium strength, slow curing, thixotropic methacrylate gasketing product. It cures in the absence of air at room temperature when confined within close fitting metal parts to seal rigid metal faces and flanges. The viscosity is 20,000 mPas and service temperature -55°C to 150°C (-67°F to 302°F).
Technical Specification
- Pack size: 250 ml tube (Loctite no. 230238)
- Available as well in 50 ml tube
Application
- close fitting joints between rigid metal faces and flanges
- as a formed-in-place gasket for pumps, thermostats, compressors, transmission housings and axle covers
Characteristics
- room-temperature curing
- instant seal to low pressures
- Composition: dimethacrylate ester
- Color: orange
- Content: 250ml tube
Technical Specification
| Chemical basis / base | Methacrylate |
| Color | Orange |
| Key characteristics | Thixotropic |
| Lab shear strength | 3.6 N/mm² |
| Recommended for use with | Metal: aluminum, Metal: steel |
| Viscosity, Brookfield – RVT, @ 25.0 °C Spindle 6, speed 20 rpm | 10000.0 – 35000.0 mPa·s (cP) |
Hazard Information (CLP)

Signal word: Danger
Hazard Statements (H-Sentences)
- H315: Causes skin irritation.
- H319: Causes serious eye irritation.
- H373: May cause organ damage through prolonged or repeated exposure.
Precautionary Statements (P-Sentences)
Prevention:
- P261: Do not breathe vapors, mist, or spray.
- P280: Wear protective gloves, eye protection, and face protection.
- P264: Wash affected area thoroughly after handling.
Response:
- P302+P352: IF ON SKIN: Wash with plenty of water.
- P305+P351+P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
- P337+P313: If eye irritation persists: Get medical advice/attention.
- P332+P313: If skin irritation occurs: Get medical advice/attention.
- P362: Take off contaminated clothing.
Storage and Disposal
Dispose of contents and/or container according to Federal, State/Provincial, and local governmental regulations.
Henkel AG & Co. KGaA, Henkelstr. 67, 40589 Düsseldorf, GERMANY, +49 211 7970, [email protected], www.henkel.com






Filippo –
Great item.
Elena S. –
Very satisfied, it’s even better than I expected. Easy to use, without making a mess. Not too big, not too small, just right. Very effective; noticed a change after just one week.
tim_88 –
Perfect and functional. Very practical and easy to use. Received quickly.
charlotte_fr –
I’ve been using it for 2 weeks and already see results!
Franziska F. –
The quality pleasantly surprised me. Really noticed a difference after using it! Surprisingly good quality for the price.
Rafael S. –
Perfect in every detail. Exactly what I needed. Everything as described.
aurelie75 –
Super fast delivery, thank you. The quality pleasantly surprised me. Easy to use, no mess at all.
Giuseppe –
Product as described. Fast delivery, good workmanship. Good customer service. Received quickly.
tristan88 –
Better than I thought; I’m satisfied. Works flawlessly.
Giuseppe –
Works great. Exactly as described. Good fit and quality. Great service, thank you.
jacob_x –
Excellent-quality product. Fast delivery and exactly as described.