LOCTITE® SI 5900 Flange Sealant
Known as LOCTITE 5900
Features and Benefits
This 1-part, silicone-based gasketing product is suitable for various substrates. Good resistance to oil and joint movement.
LOCTITE® SI 5900 is a moisture-cured, heavy-bodied, silicone-based form-in-place flange sealant with excellent resistance to oil and joint movement. Its heavy-bodied properties allow it to withstand on-line, low-pressure tests before the product begins to cure. Typical applications include stamped sheet metal covers, and it’s suitable for gaps up to 1 mm (0.04") in metal, plastic, glass, and ceramic substrates. It has a skin-over time of just 15 minutes, and once cured provides a seal that won’t shrink, compress, crack or relax, even when exposed to oil or joint movements.
- Excellent oil resistance
- Registered to NSF Category P1
- Thixotropic for ease of application
- Adheres to metal, plastic, glass, ceramic
- Gap fill up to 1 mm (0.04")
Documents and Downloads
Looking for a TDS or SDS in another language?
Technical Information
| Colour | Black |
| Cure type | Room temperature vulcanization (RTV) cure |
| Extrusion rate | 30.0 g/min. |
| Key characteristics | Adhesion: high adhesion, Oil resistance: excellent oil resistance |
| Operating temperature | -65.0 - 400.0 °F (-55.0 - 200.0 °C ) |
| Recommended for use with | Metal, Plastic |
| Storage temperature | 8.0 - 21.0 °C |
| Tack free time | 15.0 min. |
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LOCTITE® SI 5900
This 1-part, silicone-based gasketing product is suitable for various substrates. Good resistance to oil and joint movement.