Shin Etsu KR-251 Moisture Proof Insulating Resin for Electronics

Shin-Etsu KR-251 is a specialized methyl-type silicone resin solution designed for demanding protective coating applications. Supplied as a solution in toluene with 80% volatile content, it is engineered to cure rapidly into a thin, hard, and durable film. Its defining characteristics include low moisture absorption and exceptional dielectric stability across a wide operating temperature range, making it particularly valuable for safeguarding sensitive electronic components where electrical integrity and environmental protection are paramount.

Building upon its basic properties, KR-251 possesses several critical performance attributes derived directly from the TDS. Its most significant feature is the exceptionally low moisture absorption, ensuring minimal water ingress that could compromise performance. Crucially, it maintains remarkably high volume resistivity consistently across an extended temperature spectrum from 25°C to 200°C. This temperature independence of its dielectric properties is a key advantage over many other materials. Furthermore, KR-251 exhibits low compatibility with organic resins, meaning it forms a distinct, pure silicone barrier layer rather than blending. The rapid cure speed facilitates efficient processing. The resulting cured film is notably thin and hard, providing robust protection without adding significant bulk or weight to coated components.

Based on the TDS core applications (moisture proofing, insulating coatings, electrical component protection) and verified information for KR-251:

• Moisture Barrier for Sensitive Electronics: Applied as a conformal coating on PCBs (Printed Circuit Boards) in high-humidity environments (e.g., automotive sensors, industrial controls, outdoor equipment electronics) to prevent corrosion and leakage currents.
• High-Temperature Component Insulation: Protecting coils, capacitors, resistors, and connectors in applications where sustained high temperatures are encountered (e.g., near engines, power supplies, lighting systems), leveraging its stable resistivity up to 200°C.
• Dielectric Coating for HV Applications: Used where stable insulation resistance is critical at varying temperatures, such as in transformer windings or high-voltage connectors in power distribution systems.
• Protective Coating for Niche Components: Shielding delicate sensors, MEMS devices, or specialized aerospace electronics from environmental moisture and contaminants.

1. Who are we?

We are Shenzhen Huazhisheng New Material Technology Co., Ltd., a professional industrial adhesives and sealants supplier based in China since 2018. we serve global markets: Mainland China (60%), Southeast Asia (20%), North America (10%), and Europe (10%).

2. What products do you offer?

we supply high-performance adhesives and sealants from global leaders including: Cemedine, Dow Corning, Shin-Etsu, Araldite, and Momentive,etc.

3. How do you guarantee product quality?

Quality assurance through: Mandatory pre-production samples approval Final inspection by QC team before shipment International certifications: SGS, UL, FDA, RoHS, REACH

4. Why choose us over other suppliers?

Reliable Supply:Authentic products from top manufacturers Expert Support:Technical guidance for product selection Global Compliance:Certifications meeting target market standards Efficient Service:Customized solutions & professional support

5. What services do you provide?

Delivery:EXW/FOB/CIF Payment:USD/EUR/CNY/HKD via T/T, L/C Support:Technical consultation & logistics coordination