INDUSTRIAL SILICONE SEALANT

A Comprehensive Guide for Industrial Applications

Among industrial adhesives and sealing solutions, silicone-based sealants stand out for their versatile applications and superior technical properties, making them widely preferred worldwide. These products are suitable for both indoor and outdoor use and offer effective solutions in construction, automotive, electronics, marine, and industrial facilities. However, selecting the right type of silicone is critical for ensuring product performance and application safety.

 

General Properties of Silicone Sealants

Once cured, silicone-based sealants form a flexible, rubber-like structure. This makes them ideal for both static and dynamic joints.
Their key advantages include:

• 100% water resistance,

• UV and weather resistance,

• Resistance to high and low temperatures,

• Electrical insulation,

• Resistance to chemicals and microorganisms.

 

Silicones also offer excellent adhesion between different surfaces and do not yellow, crack, or shrink over time.

 

Types of Silicone and Their Technical Features

 

1. Acetoxy (Acetic) Curing Silicones

These silicones release acetic acid during curing, giving off a strong, vinegar-like smell. They cure quickly (usually within 24 hours) and provide strong bonding.

 

Advantages:

• Economical

• Ideal for glass, ceramics, tiles, and glazed surfaces

• Fast curing

 

Disadvantages:

• Can cause discoloration on natural stones and corrosion on metals due to acidic nature

• Not suitable for electronics

 

Applications:

• Glass façades

• Bathroom and kitchen joints

• General interior uses

 

2. Neutral Curing Silicones

These release alcohol (alkoxy) or ketoxime during curing and are odorless and safe for sensitive surfaces.

 

Advantages:

• Non-acidic, safe on natural stone and metal

• Long-lasting for exterior applications

• Safe for electronic components

 

Disadvantages:

• Slower curing than acetoxy types

• More expensive

 

Applications:

• Natural stone, granite, marble

• Aluminum façades

• Electronics

• Outdoor sealing joints

 

3. High-Temperature Resistant Silicones

These special formulations withstand continuous exposure up to 250°C and short-term exposure up to 300–315°C, with some going up to 350°C.

 

Applications:

• Engine gaskets

• Industrial ovens

• Exhaust and heat-exposed components

 

4. Antibacterial / Antifungal Silicones

Formulated with additives to resist mold, mildew, and bacteria in humid environments.

 

Applications:

• Industrial kitchens

• Hospitals and laboratories

• Shower cabins and sinks

 

5. Chemical and Acid-Resistant Silicones

Used in areas exposed to aggressive chemicals or acids, such as around tanks or reactors.

 

Applications:

• Chemical manufacturing facilities

• Areas exposed to cleaning agents

 

6. Low-Temperature Curing Silicones

Can operate in cold conditions and retain flexibility down to -40°C.

 

Applications:

• Cold storage rooms

• Freezers

• Outdoor installations in cold climates

 

7. Pressure Sensitive Adhesive Silicones (PSA)

These adhere upon contact and are ideal for temporary or repositionable applications.

 

Key Considerations for Choosing the Right Silicone

1. Surface type: Acidic silicones are not suitable for natural stones; use neutral silicone.

2. Environmental conditions: Use UV and weather-resistant neutral silicones for exteriors.

3. Heat resistance: Use heat-resistant silicones where needed.

4. Hygiene requirements: Use antibacterial types in food production areas.

5. Electrical applications: Use neutral silicones for insulation where required.

 

Conclusion

Silicone-based sealants offer indispensable solutions across a wide range of industrial applications with their diverse technical profiles. Choosing the correct silicone according to the project’s requirements ensures long-lasting, safe, and efficient sealing performance. Reviewing technical data sheets and consulting with professionals plays a crucial role in achieving successful outcomes.