Momentive Silicone Elastomers for Mobility and Automotive Applications

As the automotive industry accelerates toward electrification, autonomy, and increased connectivity, the demand for materials that deliver superior performance under extreme conditions is growing rapidly. Momentive’s liquid silicone rubber (LSR) and high consistency rubber (HCR) technologies stand out as essential enablers of performance, safety, and reliability across modern mobility and new energy vehicles.

Why Momentive Silicones for Automotives?

Silicone elastomers from Momentive offer a combination of properties that make them ideal for challenging automotive environments:

 

• High thermal stability in extreme under-hood temperatures (hot and cold environments)
• Low-temperature flexibility for cold-start reliability
• Resistance to oils, fuels, and automotive fluids
• Dielectric strength for high-voltage insulation
• Low compression set for long-term sealing performance
• Superior weathering and UV resistance

 

Applications in Automotives

Silopren™ LSR 2000 Series

Silopren™ LSR 2000 family of liquid silicone rubber offers a reliable choice for many OEM tiered manufacturers. LSR 2000 series excellent thermal resistance and dielectric properties for critical under-the-hood applications. While supporting high-volume production for injection molding processes with rapid cure times and low viscosity ensuring efficient manufacturing.

LIM 6000 Series

Momentive LIM 6000 grades are versatile injection molding liquid silicone rubbers. For automotive applications, LIM 6000 provides high tear and tensile strength specifically for seals, gaskets, and vibration dampers that require long term performance against mechanical stress and deformation protection. For OEM tiered manufacturers looking to improve downtime and part quality, LIM 6000 provides a seamless and clean mold release from metal mold plates. While providing a wide range of material compatibility with engineered thermoplastics and metals, for automotive assemblies that require sensor housing or connectors that demand reliable thermal stability performance.

 

Silopren™ LSR 2740 (Self-Bonding)

Silopren™ LSR 2740 combines robust primer-less adhesion to a wide range of substrates (including PBT) coupled with self-lubricating functionality. The self-lubricating effect is achieved by a fluid which exudes out of the vulcanizate over an extended period. This combination of these features makes Silopren™ LSR 2740 liquid silicone rubber ideal for OEM tiered suppliers looking to improve cost efficiency of their injection molding of hard-soft-combinations with integrated and lubricated sealing.

Silopren™ LSR 2600 Family

Silopren™ LSR 2600 series of liquid silicones encompass properties from lower viscosity, improved tear resistance to higher reactivity capabilities. Therefore, it provides the automotive manufacturers the ability to reduce the vulcanization temperature while maintaining an equivalent crosslinking and no impact on the physical properties of the vulcanizate. Overall, the Silopren™ LSR 2600 series is a high-performance portfolio that assists injection molders with faster cycler times, complex part design, improved durability for high-stress environments like within the engine compartment.

 

Momentive’s silicone elastomers are engineered for a wide variety of critical automotive components, including:

Under-Hood Applications:

• Gaskets, seals, o-rings, and diaphragms
• Hoses and spark plug boots
• Oil and fuel system valves
• Exhaust hangers and air management seals
• Fuel system valves
• Powertrain applications
• Exhaust hangers
• Air-management system gaskets

Electrical and Electronic Systems:

• Ignition cables and connector seals
• Sensor encapsulation
• Insulators and dielectric barriers
• Connector seals

Conclusion

If you would like to learn more about which grade works best, click to fill out a form and talk to one of our technical experts today!