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.
Size Please make your selection 80 ml
Packaging type Please make your selection Tube
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- Description
- Technical specification
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 600°F (316°C), 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.
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High temperature, flexible adhesive/sealant
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Suitable for applications up to 600°F (316°C)
Application method:
Dispense gun,Dispense system,Manual
Applications:
For high temperature applications,Formed in place (FIP) sealing,Gasketing,Sealing
Chemical basis / base:
Acetoxy silicone
Color:
Red
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:
Paste
Recommended for use with:
Metal
Storage temperature:
8.0 °C - 21.0 °C
Tack free time:
30.0 min.
How to use
Ensure all surfaces are cleaned to remove any residual adhesives, oil and grease. Use LOCTITE® SF 790 for easier removal of old adhesive residues. LOCTITE® SF 7070 cleaner is recommended for general surface cleaning and degreasing prior to bonding.
Use supplied nozzle and, where appropriate, cut the end to give the desired bead size. Dispense adhesive bead(s) directly onto the surface to be bonded or sealed; parts should be assembled immediately to prevent partial curing and shimming. Prevent the assembled parts from moving during cure. For large areas where both substrates are impermeable to moisture, do not cover the complete bonding area with adhesive - allow some gaps for moisture to penetrate the bond line. Any remaining gaps can be filled once the adhesive has cured.
Hold the nozzle at a 45° angle and pull along the bondline while applying dispense pressure. Test on a piece of scrap to find the appropriate speed that gives the required bead size. After assembling the parts, wipe away product squeezed out of the joint with a gloved finger or a finishing tool. Leave the nozzle on the cartridge after use to act as a sealing cap.
FAQ
For flange sealing applications anaerobic adhesives are preferable when high strength is required (usually for rigid machined parts rather than pressed/flexible flanges); when high chemical/solvent resistance is required; and on metal components where there is limited moisture or exposure to the environment. Silicones are recommended where there are large gaps, open/exposed bond areas, or when high flexibility or extremely high temperature resistance (generally in excess of 150°C) is required.
Both silicones and SMP adhesives provide excellent flexibility and gap-filling properties together with high adhesion to a wide range of substrates, making them ideal for elastic bonding & sealing applications. Silicones have superior thermal resistance for high-temperature applications whereas SMP adhesives are suitable for applications that require over-painting. There are a range of properties available for each technology type. Please speak with a Henkel representative regarding your application to determine the best available grade.
LOCTITE® silicone adhesives can be used for such applications. High temperature resistance is a necessity and materials like LOCTITE® SI 5920 or LOCTITE® SI 5990 can be considered.
The operating temperature range for standard LOCTITE® anaerobic threadlockers / thread sealants / gasketing adhesives is -55°C to +150°C. High-performance anaerobic grades, or alternative technologies such as silicones, can offer significantly improved temperature resistance depending on the specific application requirements. Consult Henkel's online product resources or contact our technical teams for further information.
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