Silicone Sealants for Automotive Applications
Redisil silicone sealants provide flexible sealing solutions for suitable automotive components, housings, covers, electrical enclosures, body interfaces and mechanical assemblies.
Automotive components operate under vibration, temperature cycling, moisture, dust, oils and demanding environmental conditions. The right silicone sealant can help maintain sealing integrity while accommodating movement and thermal expansion.
Silicone Sealing Solutions for the Automotive Industry
Automotive sealing applications require materials that can withstand vibration, temperature variation, moisture, weathering and, depending on the application, exposure to oils and other automotive fluids.
Silicone sealants are used where a flexible, durable seal is required around suitable joints, housings, covers, panels and electrical assemblies.
Redisil focuses on silicone-based sealing solutions, while the Fasto Silicone Compounds portfolio provides additional application-specific RTV silicone technologies for demanding automotive and mechanical applications.
Automotive Sealing Challenges
Automotive Applications Where Silicone Sealants Are Used
Silicone sealant selection should always be based on the actual component, substrate, temperature, fluid exposure, joint movement and required service performance.
Passenger Cars
Silicone sealants can be evaluated for suitable non-structural automotive sealing applications.
- Engine covers
- Electrical housings
- Sensor housings
- Lighting assemblies
- Protective covers
Two-Wheelers
Motorcycles and scooters require flexible sealing solutions for components exposed to vibration, weather and temperature.
- Engine covers
- Gearbox housings
- Electrical enclosures
- Lighting housings
- Protective panels
Commercial Vehicles
Trucks and commercial vehicles experience continuous vibration, temperature changes and demanding road environments.
- Engine housings
- Transmission components
- Electrical enclosures
- Equipment covers
- Body interfaces
Automotive Components
Silicone sealants can provide environmental protection for suitable automotive component assemblies.
- Control housings
- Sensor assemblies
- Electrical modules
- Equipment housings
- Protective covers
Automotive Electrical Systems
Selected neutral-cure silicone products can be evaluated for suitable electrical and electronic enclosure sealing.
- Electrical enclosures
- Connector housings
- Control modules
- Cable-entry points
- Lighting systems
Automotive Aftermarket & Maintenance
Silicone sealants can be used in suitable maintenance and replacement sealing applications where a flexible RTV seal is required.
- Housing covers
- Flange interfaces
- Equipment enclosures
- Protective covers
- General sealing
Automotive Silicone Sealant Applications
Different automotive assemblies require different silicone characteristics. Select the product according to the operating conditions of the actual application.
Engine & Cover Sealing
High-performance RTV silicone can be evaluated for suitable engine covers and housing interfaces where temperature, vibration and fluid exposure are relevant.
- Engine covers
- Timing covers
- Housing interfaces
- Inspection covers
Gearbox & Transmission Sealing
Selected automotive-grade RTV silicone sealants can be used for suitable gearbox and transmission housing sealing applications.
- Gearbox flanges
- Transmission housings
- Timing covers
- Mechanical joints
Oil-Exposed Assemblies
Oil-tolerant silicone formulations can be evaluated where sealing assemblies are exposed to lubricants and suitable automotive fluids.
- Oil sump areas
- Engine housings
- Gearbox assemblies
- Mechanical covers
Electrical Enclosure Sealing
Neutral-cure silicone sealants can be considered for suitable electrical housings where non-corrosive environmental sealing is required.
- Control modules
- Electrical housings
- Connector assemblies
- Cable entries
Lighting & Lamp Housings
Silicone sealants can be evaluated for suitable lighting housings requiring moisture and environmental protection.
- Headlamp housings
- Rear lamp housings
- Signal lamps
- Protective covers
Sensor & Component Housings
Selected silicone grades can provide flexible environmental sealing around suitable sensor and electronic component housings.
- Sensor housings
- Control boxes
- Electronic modules
- Protective enclosures
Redisil Silicone Sealants for Automotive Applications
Redisil silicone sealants provide general-purpose, high-performance and weather-resistant RTV options for suitable automotive sealing applications.
Redisil NP Pro
One-part neutral-cure RTV silicone sealant for durable sealing, bonding and glazing applications.
- Neutral cure
- Non-corrosive
- Single-component
- Flexible cured seal
- Weather resistance
- Suitable for metals and sensitive substrates
Redisil 789 Pro
Weather-grade neutral-cure RTV silicone for suitable automotive components and outdoor-exposed assemblies.
- Neutral cure
- Non-corrosive
- UV resistance
- Weather resistance
- Flexible cured seal
- Outdoor environmental protection
Redisil GP Pro
General-purpose weather RTV silicone for suitable automotive maintenance, equipment and environmental sealing applications.
- General-purpose RTV
- Flexible sealing
- Weather resistance
- Suitable maintenance applications
- Multipurpose sealing
Fasto Silicone Compounds for Automotive Applications
For demanding automotive sealing requirements, the Fasto Silicone Compounds portfolio provides application-specific RTV silicone technologies for oil exposure, mechanical loads, temperature and environmental sealing.
Fasto S990
One-part heavy-duty neutral-cure RTV silicone sealant designed for oil-exposed and mechanically demanding sealing applications.
- Neutral cure
- Non-corrosive
- High oil tolerance
- Heavy-duty performance
- Wide temperature resistance
- Non-slump application
Fasto S985
High-performance neutral-cure RTV silicone for demanding mechanical, automotive and flange sealing.
- Neutral cure
- Non-corrosive
- High oil tolerance
- Heavy-duty sealing
- High temperature resistance
- Non-slump application
Fasto S982
Neutral-cure RTV silicone engineered for demanding industrial, mechanical and automotive sealing.
- Neutral cure
- Non-corrosive
- Oil tolerant
- High flexibility
- Vibration accommodation
- Wide temperature resistance
Fasto S960
High-temperature RTV silicone sealant for suitable automotive and mechanical assemblies exposed to elevated continuous or intermittent temperatures.
- High temperature resistance
- One-part RTV
- Flexible and elastic
- Mechanical applications
- Automotive applications
Fasto S970
Neutral-cure industrial RTV silicone for flexible sealing and suitable automotive equipment applications.
- Neutral cure
- Non-corrosive
- Flexible cured seal
- Vibration accommodation
- Industrial & automotive use
Fasto S887
One-part neutral-cure RTV silicone for suitable automotive, electrical, mechanical and environmental sealing applications.
- Neutral cure
- Non-corrosive
- High flexibility
- UV & weather resistance
- Multiple substrate compatibility
Automotive Silicone Sealant Selection Guide
| Automotive Application | Silicone Product Direction | Main Requirement |
|---|---|---|
| General automotive component sealing | Redisil NP Pro | Neutral-cure flexible environmental sealing |
| Outdoor automotive components | Redisil 789 Pro | Weather and UV exposure |
| General-purpose automotive maintenance | Redisil GP Pro | General flexible RTV sealing |
| Engine & oil-exposed sealing | Fasto S990 | Oil tolerance and heavy-duty sealing |
| Gearbox & transmission sealing | Fasto S985 | Oil exposure, vibration and mechanical loads |
| Industrial / automotive mechanical sealing | Fasto S982 | Oil tolerance, flexibility and temperature resistance |
| High-temperature automotive assemblies | Fasto S960 | Elevated temperature sealing |
| Sensitive metal / electrical assemblies | Fasto S887 | Neutral, non-corrosive flexible sealing |
Product selection should be validated against the actual substrate, operating temperature, joint design, vibration, fluid exposure and required service conditions.
Benefits of Silicone Sealants in Automotive Applications
How to Apply Silicone Sealant in Automotive Assemblies
Proper surface preparation and application are essential for reliable silicone sealing performance.
Clean
Remove oil, grease, dust, rust, dirt and other contaminants from the sealing surface.
Prepare
Confirm substrate compatibility and prepare surfaces according to the selected product Technical Data Sheet.
Apply
Apply a continuous and uniform silicone bead using suitable dispensing equipment.
Assemble
Assemble mating components according to the product application instructions and avoid premature skinning.
Cure
Allow the silicone to cure according to the selected product TDS and actual temperature and humidity.
Explore the Fasto Silicone Compounds Range
Redisil is part of the silicone-focused product architecture. For automotive OEM and demanding mechanical applications, Fasto provides additional silicone formulations for specific sealing requirements.
Fasto Silicone Compounds
Explore RTV silicone sealants including automotive-grade, industrial-grade, neutral-cure, high-temperature, general-purpose and gap-filling silicone products.
View Complete Silicone Range →Fasto Automotive Silicone Solutions
Explore the automotive market applications and discover silicone sealing solutions for cars, two-wheelers, three-wheelers and automotive components.
Explore Fasto Automotive →Frequently Asked Questions
What are silicone sealants used for in automotive applications?
Silicone sealants can be evaluated for suitable engine covers, gearbox housings, electrical enclosures, lighting housings, component covers and other non-structural automotive sealing applications.
Can silicone sealants be used for automotive engine sealing?
Selected automotive-grade RTV silicone sealants can be evaluated for suitable engine covers, housings and flange interfaces. Temperature, oil exposure and joint design should be considered before product selection.
Which Redisil silicone sealant is suitable for automotive applications?
Redisil NP Pro is positioned as a high-performance neutral-cure RTV option for suitable applications. Redisil 789 Pro is useful to evaluate for weather-exposed applications, while Redisil GP Pro is a general-purpose silicone option.
Which silicone sealant is suitable for automotive gearbox sealing?
Fasto S990 and S985 are automotive-grade RTV silicone sealants positioned for demanding mechanical, flange, gearbox and oil-exposed applications. The correct grade should be selected according to the actual assembly.
Which silicone sealant is suitable for oil-exposed automotive applications?
Fasto S990, S985 and S982 are silicone products positioned for oil-tolerant mechanical and automotive sealing applications. Actual fluid compatibility should be validated before production use.
What is neutral-cure silicone sealant?
Neutral-cure silicone cures without the acidic by-products associated with acetoxy-cure systems. It is commonly selected where non-corrosive curing is important for suitable metals and sensitive components.
Can silicone sealants withstand automotive vibration?
Flexible silicone sealants can accommodate suitable vibration, joint movement and thermal expansion. Product selection depends on the actual joint and operating environment.
Can silicone sealants be used for automotive electrical enclosures?
Yes. Selected neutral-cure silicone products can be evaluated for suitable electrical enclosures, housings and environmental sealing applications.
What is the difference between Redisil and Fasto silicone sealants?
Redisil is the silicone-focused brand for practical commercial and sealing applications, while Fasto provides a broader silicone compound portfolio with application-specific RTV technologies for automotive, industrial, solar, LED and other markets.
Where can I see the complete Fasto Silicone Compounds range?
The complete silicone portfolio, including automotive, industrial, high-temperature and neutral-cure RTV silicone products, is available on the Fasto Silicone Compounds page.
Looking for the Right Automotive Silicone Sealant?
Share your automotive component, substrate, joint design, operating temperature, vibration level, fluid exposure and sealing requirement. Our team can help identify a suitable Redisil or Fasto Silicone Compound.
Explore Silicone CompoundsProduct suitability depends on the specific application, substrate, joint design, temperature, vibration, fluid exposure, environmental conditions and required performance. Always review the latest Technical Data Sheet and validate the selected silicone product under actual application conditions before production use.
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