Brief Introduction
The Loctite SI596 silicone adhesive sealant is a high-performance, single-component solution designed for demanding high-temperature sealing applications. As a trusted product from Loctite, it features room temperature vulcanization (RTV) technology, curing to form a tough, flexible rubber seal. With exceptional high temperature resistance and oil resistance, this flange sealant is ideal for industrial settings where extreme heat, chemicals, and harsh conditions are present. Its low odor and low volatility make it user-friendly, while its durability ensures long-lasting sealing performance.
Core Features
Exceptional High-Temperature Resistance
A standout attribute of Loctite SI596 is its exceptional high-temperature resistance, allowing it to perform reliably in environments up to extreme heat levels. It maintains flexibility and sealing integrity without hardening, shrinking, or cracking.
Superior Oil Resistance
This silicone adhesive sealant offers superior oil resistance, repelling industrial oils and lubricants. It prevents oil penetration, making it suitable for applications where oil exposure is common, such as engine components and industrial machinery.
Room Temperature Vulcanization (RTV) Cure
The RTV cure technology allows the sealant to cure at room temperature upon exposure to atmospheric moisture. No special heating or curing equipment is needed, simplifying the application process.
Flexible and Tough Rubber Seal
After curing, Loctite SI596 forms a flexible and tough rubber seal that accommodates thermal expansion and contraction. This flexibility prevents seal failure due to temperature fluctuations or vibrations.
Low Odor and Low Volatility
Featuring low odor and low volatility, this sealant is safe and comfortable to use in enclosed or well-ventilated spaces. It minimizes unpleasant fumes, enhancing user experience during application.
Waterproof Sealing Performance
The silicone adhesive base provides waterproof sealing, protecting components from moisture damage. It forms a tight barrier against water ingress, making it suitable for both indoor and outdoor applications.
Acetoxy Silicone Base
Formulated with an acetoxy silicone base, the sealant offers strong adhesion to various surfaces, particularly metals. It creates a durable bond that withstands harsh conditions and repeated use.
Flowable Paste Form
The flowable paste consistency of Loctite SI596 allows for easy application, even in hard-to-reach areas. It spreads smoothly, ensuring uniform coverage and consistent sealing thickness.
Resistance to Aging and Thermal Cycling
This sealant resists aging and thermal cycling, maintaining its performance over time. It withstands repeated exposure to high and low temperatures without degrading, extending the lifespan of sealed components.
Ideal for Flange Sealing
Designed as a flange sealant, it excels at sealing flange connections in industrial equipment. It fills gaps between flanges, creating a leak-free seal that prevents fluid or gas escape.
| 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 )Pressure 0.62 MPa | ≥250.0 g/min. |
| Key characteristics | Flexible, Temperature resistant, Thixotropic |
| Number of components | 1 part |
| Operating temperature | -75.0 - 600.0 °F (59.0 - 316.0 °C ) |
| Physical form | Paste |
| Recommended for use with | Metal |
| Storage temperature | 8.0 - 21.0 °C |
| Tack free time | 30.0 min. |
Typical Uses
Industrial Furnace Sealing
Loctite SI596 is perfect for industrial furnace sealing, where it withstands extreme heat inside furnaces and ovens. It seals joints in furnace doors, chambers, and heating elements, ensuring efficient heat retention and preventing heat loss.
Boiler and Exhaust Stack Connections
Boilers and exhaust stacks operate at high temperatures and are exposed to exhaust gases. This high-temperature silicone sealant seals connections in these systems, preventing leaks and protecting against corrosion.
High-Temperature Ducting Systems
Ducting systems that transport hot air or gases benefit from the heat resistance of Loctite SI596. It seals joints in ductwork, ensuring efficient airflow and preventing heat leakage.
Electrical Appliance Heating Elements
Heating elements in electrical appliances such as ovens, toasters, and heaters require reliable sealing. This sealant protects electrical components from moisture and heat, ensuring safe and efficient operation.
Precautions
Optimal Storage Temperature
Store Loctite SI596 in a cool environment within the recommended temperature range. Extreme heat or cold can affect the product’s flowability and curing properties.
Surface Cleaning and Preparation
Ensure surfaces to be sealed are clean, dry, and free of oil, grease, or dirt. Proper surface preparation is essential for strong adhesion and effective sealing.
Cure Conditions
Allow sufficient time for the sealant to cure. The RTV cure process depends on moisture and temperature, so avoid applying in extremely dry or cold conditions, which can slow curing.
Safe Handling and Ventilation
While the product has low odor and low volatility, use it in a well-ventilated area. Wear protective gloves to avoid direct skin contact, and avoid inhalation of fumes during application.
Compatibility with Non-Metal Materials
While Loctite SI596 adheres well to metals, test compatibility with non-metal surfaces before full application. Some plastics or rubber materials may not bond effectively with the acetoxy silicone base.
FAQ
What is the maximum temperature Loctite SI596 can withstand?
Loctite SI596 offers exceptional high-temperature resistance, performing reliably in extreme heat environments. It maintains its sealing properties without degradation even at elevated temperatures.
Does it require special tools for application?
No, the flowable paste form allows for easy application using standard dispense guns, dispense systems, or manual methods. No specialized equipment is needed for most applications.
Is this silicone sealant resistant to oil and water?
Yes, it features superior oil resistance and waterproof sealing performance, making it suitable for applications exposed to oils, lubricants, and moisture.
How long does it take to become tack-free?
The tack-free time depends on environmental conditions such as temperature and moisture, but the RTV cure process allows it to become tack-free within a reasonable period for most industrial applications.
Can it be used for outdoor applications?
Absolutely. The waterproof and weather-resistant properties of Loctite SI596 make it suitable for outdoor use. It withstands rain, humidity, and temperature fluctuations without losing sealing effectiveness.
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