Solvent-Free Silicone Conformal Coating For Automotive | High-Temp RTV - SK-901U8-C

Fong Yong Chemical Co., Ltd. is one of the leading manufacturers and suppliers of solvent-free silicone conformal coating for automotive | high-temp rtv - sk-901u8-c in Taiwan. With abundant experience, we warmly welcome you to buy high quality customized products at competitive price from our factory. If you have any enquiry about quotation, please feel free to email us.

 

The SK-901U8-C is a high-performance, one-component, solvent-free RTV silicone conformal coating designed to protect electronic assemblies operating in harsh automotive environments. Manufactured in Taiwan under an IATF 16949–certified quality management system (🔗 link to certificate), this coating forms a flexible and durable protective barrier for PCBAs exposed to extreme temperatures, vibration, humidity, and chemical contaminants. Once cured, it enhances electrical insulation, moisture resistance, and long-term reliability, making it an ideal solution for the global automotive electronics supply chain.

 

What Is a Solvent-Free Silicone Conformal Coating?

A solvent-free silicone conformal coating is an RTV (room-temperature vulcanizing) material that cures through moisture reaction to form a uniform, moisture-resistant protective layer without releasing volatile organic compounds (VOCs).

 

Compared with solvent-based coatings, solvent-free systems provide stable film thickness, reduced VOC emissions, and improved process control. These are critical advantages for automotive electronics manufacturing and maintaining environmental compliance.

 

Advanced Features & Technical Specifications

As an experienced electronic-grade silicone manufacturer with an IATF 16949–certified quality management system in Taiwan, we supply advanced SK-901U8-C materials designed to meet rigorous international standards for automotive safety and environmental compliance.

• Manufacturing Origin: Taiwan (Fong Yong Chemical).
• Solvent-Free RTV System: Eliminates VOC emissions and ensures stable coating thickness with no shrinkage during cure.
• Thermal Stability: Maintains flexibility and insulation performance from –50°C to +200°C.
• UV Indicator for Inspection: Built-in UV tracer supports Automated Optical Inspection (AOI) for reliable coating coverage verification.
• Dielectric Strength: ≥ 15 kV/mm, providing excellent electrical insulation for high-density electronic circuits.
• Availability: Offered in bulk / wholesale quantities, with customized viscosity options available upon request.

 

 

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Technical Specifications

Appearance	Liquid
Color	Yellowish Translucent
Viscosity (cps, 25℃)	1,000 ~ 2,500
Specific Gravity (25℃)	1.0
Skin-Over Time (25℃)	5 ~ 25 mins
Cure Time (25℃, 3mm)	24 hours
Cured Appearance	Yellowish Translucent Elastomer
Hardness (Shore A)	30
Tensile Strength (psi)	90
Elongation (%)	100
Volume Resistivity (Ω‧cm)	1 × 1015
Dielectric Strength (KV/mm)	18

 

Workflow & Versatile Application Methods

SK-901U8-C is designed to support both high-volume automated production and manual rework.

 

Step 1 – Surface Preparation

Clean the PCB substrate thoroughly to remove oils and dust. Proper surface preparation ensures optimal adhesion required for harsh environment electronics.

 

Step 2 – Coating Application (Automated, Brush, or Dip)

• Automated Coating: Optimized for precision dispensing and high-volume automotive manufacturing lines.
• Brush Coating: Suitable for manual application and rework, offering excellent leveling and no VOC odor.
• Dip Coating: Ensures complete 360-degree coverage for complex electronic assemblies.

 

Step 3 – UV Inspection & Curing

After application, verify coverage using the integrated UV indicator. The material undergoes a room-temperature moisture cure process, forming a durable, moisture-resistant film that protects against humidity and automotive chemicals.

 

Typical Applications

SK-901U8-C is specifically recommended for high-reliability automotive assemblies, including:

• Automotive ECUs and control modules.
• Sensors and signal processing boards exposed to vibration.
• Power management and high-voltage control PCBs.

 

Why Partner with Fong Yong?

• Taiwan Excellence: Benefit from advanced production technology from a trusted Taiwan manufacturer.
• Global Wholesale: We support large-scale industrial needs with competitive bulk/wholesale lead times.
• Customized R&D: We offer customized viscosity or curing speeds to match your specific production workflow.

 

Frequently Asked Questions (FAQ)

Q1: Is Fong Yong Chemical a direct manufacturer?

A1:Yes. We are a professional manufacturer in Taiwan operating under an IATF 16949–certified quality management system.

 

Q2: What are the advantages of solvent-free silicone conformal coatings?

A2: They provide stable film thickness, reduced VOC emissions, and reliable insulation, making them ideal for environmental compliance.

 

Q3: Can SK-901U8-C be used for high-temperature applications?

A3: Yes. The coating maintains its flexibility and insulation performance across a wide range from –50°C to +200°C.

 

Q4: What is the curing time for SK-901U8-C?

A4: As a moisture-cure RTV silicone, it typically reaches tack-free status within 10-20 minutes at room temperature, with full cure achieved within 24 hours depending on humidity and coating thickness.

 

Q5: What is the shelf life and storage requirement?

A5: SK-901U8-C has a shelf life of 6 to 8 months when stored in its original unopened container in a cool, dry place (below 25°C). Since it is moisture-sensitive, containers should be tightly sealed after use.

 

Call to Action

For high-performance applications demanding superior flexibility, extreme thermal stability, and uncompromising insulation reliability, SK-901U8-C is the proven choice. Developed and produced under an IATF 16949–certified quality management system, this solvent-free silicone conformal coating ensures long-term field reliability for safety-critical systems.

 

Contact Fong Yong Chemical today for a bulk / wholesale quotation or to request customized samples and technical data of SK-901U8-C.

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