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WACKER silicones are the ideal materials for use in extreme conditions, such as those found in automotive applications, especially e-mobility. Whether in electric motors, power electronics, displays, cables and plugs, fuel cells, batteries or sensors: our high-performance silicones have exceptional properties that enable our customers to secure pole position in their particular market.

Our silicones protect sensitive electronics and support thermal management. This enables the key topics – electrification, connectivity and autonomous driving – to be implemented reliably and economically. Silicones from WACKER guarantee high reliability and a long service life. In addition, flame-retardant silicone coatings make it possible to use lightweight laminates to separate individual compartments in the car, e.g. to separate the battery from the passenger compartment.

General Benefits:

  • Protection of engine components against moisture, environmental impacts, chemicals, coolants and fluids
  • Vibration damping (from -45 °C up to >180 °C)
  • Heat resistance (180 °C up to 230 °C continuous load) and active cooling support
  • Longer life and performance of electric insulation over a broad temperature and frequency range

Applications in Electric Motors:

  • Impregnation of electrical coils (rotor/stator) with silicone resins
  • Coil potting with silicone elastomers
  • Active cooling with silicone fluid
  • Protection of electrical connections by potting junction boxes and connector rings with silicone elastomers
  • Permanent magnet bonding with high tear-strength silicone adhesives

Applications in Gearbox Mounted Hybrid Modules:

  • Active cooling
  • Permanent magnet bonding
  • Coil impregnation
  • Potting of coil connector rings/junction boxes

Applications in Direct Drives:

  • Active cooling
  • Coil impregnation
  • Potting of coil connector rings/junction boxes

General Benefits:

  • Keep operating temperatures within an optimum range, connect elements to active cooling systems
  • Protect against moisture, oxidation, chemicals and vibration
  • Extend life and performance

Benefits for Battery Modules:

  • Dissipate heat (thermal management)
  • Couple cells with heat-sink elements (bonding)
  • Couple cells for vibration control (bonding)
  • Seal modules (CIPG – cured-in-place gasket)

Benefits for Battery Pack Systems:

  • Dissipate heat (thermal management)/couple modules to active cooling
  • Seal modules (CIPG – cured-in-place gasket)
  • Insulate high-voltage cables and seal connectors
  • Silicones for battery management systems
  • Protect electronic components (encapsulation)

Benefits for Battery Management Systems:

  • Protect electronic components (encapsulation)


  • Battery sealing
  • Sealing of battery module and battery housing
  • Couple cells for vibration control
  • Thermal management through coupling of cells to active cooling systems
  • High-voltage cables and connectors
  • Potting of electronics in battery management system

Benefits of Silicone Gaskets:

  • Chemically inert, i.e. their properties remain stable in a fuel-cell set-up and during operation, and do not negatively affect the fuel-cell performance
  • Excellent compression set, ensuring gas and coolant tightness and securing the fuel cell against leakage over its full lifetime
  • Excellent thermal and degradation resistance


  • Sealing bipolar plates (BPP)/membrane electrode assembly (MEA): dispensing/screen printing/injection molding
  • Sealing of housing and auxiliary units
  • Potting and bonding of sensor applications
  • Potting of control electronics


  • Injection molding
  • Low-pressure injection molding
  • Screen printing
  • Dispensing
  • Potting
  • Sealing

Additional Information