Description
LOCTITE® 5203 is a methacrylate-based gasketing product that is ideal where very low strength is of paramount importance (ease of disassembly). Designed for use with machined, rigid metal flanges, the product demonstrates a fixture time of 10 minutes (steel) and 20 minutes (aluminium). It cures anaerobically and is suitable for gaps up to 0.125 mm.
- Pack size: 50 ml cartridge (Loctite no. 232305)
- Available as well in 300 ml cartridge
Application
- Product for machined metal flanges where easy disassembly is vital. For gaps up to 0.125 mm
Characteristics
- Very low strength for ease of disassembly
- Designed for machined metal flanges
- Seals close fitting joints
- Reduced migration of liquid after application
Technical Information
| Chemical Basis / Base | Methacrylate |
| Colour | Red |
| Fixture Time | 10.0 – 20.0 min. |
| Gap Fill | 0.125 mm |
| Lab Shear Strength | 1.0 N/mm² |
| Substrates | Aluminium, Metal: Steel |
| Viscosity, Brookfield – RVT, @ 25.0 °C Spindle 7, speed 2.5 rpm | 200000.0 – 450000.0 mPa·s (cP) |
| Viscosity, Brookfield – RVT, @ 25.0 °C Spindle 7, speed 20 rpm | 50000.0 – 100000.0 mPa·s (cP) |
Label Elements (CLP)
Hazard pictogram:

Signal word: Warning
Hazard Statements
- H315: Causes skin irritation.
- H317: May cause an allergic skin reaction.
- H319: Causes serious eye 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:
- P280: Wear protective gloves.
Response:
- P302+P352: IF ON SKIN: Wash with plenty of soap and water.
- P337+P313: If eye irritation persists: Get medical advice/attention.
- P333+P313: If skin irritation or rash occurs: Get medical advice/attention.
Other Hazards:
None if used properly. Not fulfilling Persistent, Bioaccumulative, and Toxic (PBT), very Persistent, and very Bioaccumulative (vPvB) criteria.
Henkel AG & Co. KGaA, Henkelstr. 67, 40589 Düsseldorf, GERMANY, +49 211 7970, [email protected], www.henkel.com






Gabriel J. –
Very functional.
emily_rose –
Packaging was slightly damaged, but the product is excellent. Easy to use, no mess at all. A friend recommended it to me and I’m thrilled with the purchase. It completely solved my problem!
francois_fr –
Arrived as promised. Excellent quality and price.
Valeria F. –
Very effective; I noticed a change in just one week.
joseph88 –
Recommended. Works just as advertised.
massimo_it –
Great purchase.
chloe_rose –
Better than anything I’ve tried before.
eva_s –
I noticed the difference right away!
logan23 –
Impeccable quality.
Penelope –
Super fast delivery, thank you. This solved my problem completely! Easy to use, without making a mess. The quality pleasantly surprised me.