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Henkel Adhesive Technologies

Henkel Adhesive Technologies

Gasketing sealants


Fast-setting, heavy bodied, oil-resistant RTV sealant for flexible flanges

Silicone-based gasketing product suitable for various substrates. Good resistance to oil and joint movement.

All marks used are trademarks and/or registered trademarks of Henkel and its affiliates in the US, Germany, and elsewhere.

Part no. (SKU/IDH) 743912
LOCTITE® SI 5900, 90 ml Aerosol Can

Size Please make your selection 90 ml

Packaging type Please make your selection Aerosol Can



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 1mm (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.



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 °F - 400.0 °F (-55.0 °C - 200.0 °C)

Recommended for use with:


Storage temperature:

8.0 °C - 21.0 °C

Tack free time:

15.0 min.

Associated industries and market segments

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