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Henkel Adhesive Technologies

Henkel Adhesive Technologies

Gasketing sealants


RTV sealant with excellent oil and water / glycol resistance for all flanges

Highly flexible, moisture-cure silicone sealant with excellent oil and water-glycol resistance. For rigid flange sealing, for example on transmissions and cast metal housings.

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

Part no. (SKU/IDH) 135275
LOCTITE® SI 5699, 70 ml Tube

Size Please make your selection 70 ml

Packaging type Please make your selection Standard Cartridge



LOCTITE® SI 5699 is a flexible, form-in-place, room temperature vulcanizing (RTV) silicone sealant, which cures at room temperature on exposure to moisture in the air to form a tough rubber gasket. It is tack-free after just 10 minutes, and can be used on flexible, machined or cast surfaces, metal or plastic. Great for flange sealing and rigid flange sealing on, for example, transmissions and cast metal housings. Perfect for when water-glycol resistance is required.


Highly flexible assembly gasketing



Cure type:

Room temperature vulcanization (RTV) cure

Extrusion rate:

200.0 g/min.

Key characteristics:

Oil resistance: increased 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:

30.0 min.

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