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Henkel Adhesive Technologies

Henkel Adhesive Technologies

Flexible sealants


Red, high-temperature RTV silicone sealant

Flowable, 1-part silicone adhesive sealant, which cures at room temperature to form a tough rubber seal with high temperature resistance.

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

Part no. (SKU/IDH) 135507
LOCTITE® SI 596, 80 ml Tube

Size Please make your selection 80 ml

Packaging type Please make your selection Tube



LOCTITE® SI 596 is a red, flowable, smooth, 1-part RTV (room temperature vulcanizing) acetoxy silicone paste sealant that cures at room temperature on exposure to moisture in the air to form a tough, flexible, waterproof, oil-resistant silicone rubber bond. It resists temperatures up to 316°C (600°F), making it well suited for sealing applications in industrial furnaces, ovens, boilers, exhaust stacks, high temperature ducting and heating elements in electrical appliances. It resists aging, weathering and thermal cycling without hardening, shrinking or cracking.

Application method:

Dispense gun,Dispense system,Manual


For high temperature applications,Formed in place (FIP) sealing,Gasketing,Sealing

Chemical basis / base:

Acetoxy silicone



Cure type:

Room temperature vulcanization (RTV) cure

Extrusion rate, @ 15.0 sec. (25.0 °C):

≥ 250.0 g/min.

Key characteristics:

Flexible,Temperature resistant,Thixotropic

Number of components:

1 part

Operating temperature:

-75.0 °F - 600.0 °F (59.0 °C - 316.0 °C)

Physical form:


Recommended for use with:


Storage temperature:

8.0 °C - 21.0 °C

Tack free time:

30.0 min.

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