ShinEtsu X-40-2327 is a heat-resistant silicone coating designed for electrical insulation applications that experience continuous thermal exposure. It forms a flexible, durable film that adheres well to insulated wires and automotive ignition components, giving users a stable coating performance even in high-temperature environments. The product spreads uniformly and dries into a firm protective layer, offering a smooth application feel and reliable film formation for electrical parts during production.

• Thermal Resist - X-40-2327 uses a silicone resin system with a measured viscosity of about 1500 mm²/s at 25 °C, supporting uniform film formation under elevated temperatures. Thermal-cycling evaluations conducted above 200 °C show stable coating integrity without softening, confirming suitability for ignition-coil and motor-insulation environments where long-term heat durability is required.

  
  

• Film Strength - The cured coating forms a flexible film with a specific gravity near 1.05, indicating strong mechanical retention under heat exposure. Tensile-stress and crack-propagation tests performed at temperatures above 180 °C demonstrate low cracking tendency, supporting stable insulation performance on substrates subjected to vibration or thermal shock.

  
  

• Electrical Insul - Dielectric performance tests confirm reliable insulation strength, supported by a refractive index measured at approximately 1.420 at 25 °C. The cured layer maintains insulation stability during high-voltage endurance testing, enabling its use in components that require both electrical isolation and resistance to thermal degradation.

  
  

• Adhesion Build - The silicone-resin formulation enhances adhesion to metallic and ceramic-filled substrates, helping reduce delamination during high-stress processing. Pull-off evaluations conducted on coated metal surfaces show stable bonding after repeated heat-cycle exposure, supporting long-term coating reliability in industrial environments.

  
  

• Environmental Resist - The cured film demonstrates resistance to moisture, oxidation, and chemical exposure in accelerated-aging tests. Stability assessments above 150 °C under humid conditions show minimal surface degradation, validating suitability for insulation systems that require prolonged durability under harsh operating conditions.

• Automotive Components - X-40-2327 is widely used in automotive functional parts requiring stable performance under continuous thermal loads, particularly where components operate near 150–180 °C. Its ability to maintain coating firmness under engine-bay temperatures supports use in modules such as ignition housings, under-hood connectors, and thermal-exposed electronic assemblies, ensuring consistent operation during long-duration driving cycles.

  
  

• Electrical Insulation - The material supports insulation stability for electrical devices that must maintain dielectric protection at temperatures exceeding 150 °C. Compatibility tests with common coil-winding substrates verify that X-40-2327 maintains adhesion and insulation thickness uniformity during prolonged operation, making it suitable for high-voltage modules, electrical sealing layers, and insulating coatings used in compact power units.

  
  

• Coil Coatings - X-40-2327 is applied to ignition coils and transformer coils where reliable surface protection is required during repeated energizing cycles. Coating uniformity measurements confirm stable film formation during curing, helping reduce surface carbonization and maintaining coil efficiency in systems where operational temperatures routinely approach 160–200 °C. This enhances durability in continuous ignition environments.

  
  

• Motor Components - The formulation supports insulation stability in motors subjected to sustained heating during load operation. Performance assessments on rotor and stator surfaces show consistent coating adhesion after mechanical rotation testing, making it suitable for electric-motor windings, thermal barriers, and insulation layers that must withstand temperature fluctuations without compromising operational output.

  
  

• Heat-Resistant Coatings - X-40-2327 is used as a heat-resistant protective coating on substrates exposed to direct thermal flow such as ignition systems, motor housings, and high-temperature sealing layers. Temperature-exposure evaluations above 180 °C indicate low discoloration and stable film preservation, supporting its use in applications that require long-term thermal endurance and reduced maintenance frequency.