EV Coolant-Resistant LSR Launched for Battery Seals

2026,11,10

Keywords: coolant resistant LSR, EV battery silicone seal, Liquid silicone rubber, low compression set, e-mobility silicone

Key sentence: The new self-lubricating liquid silicone rubber balances easy automated assembly and long-term sealing stability for high-voltage EV thermal management systems.

Nov 10, 2026 – A global silicone material developer has rolled out a coolant-resistant liquid silicone rubber grade customized for EV battery cooling circuit seals, targeting growing demand for reliable thermal management components in electric passenger and commercial vehicles. This specialty LSR features built-in oil exudation to form a thin lubricating film on molded surfaces, cutting friction during automated connector assembly and lowering production reject rates for mass molding factories. It maintains ultra-low compression set after thousands of thermal cycles, resisting common battery coolants and thermal shocks between -40°C and 180°C without cracking or losing sealing force. Unlike traditional silicone sealants that swell or degrade under long coolant exposure, this formulation uses modified siloxane crosslinking chemistry to lock in dimensional stability. It fits overmolding and two-shot injection molding workflows and supports high-volume production for battery pack gaskets, high-voltage connector seals and cooling pipe fittings. EV component makers report that the material eliminates extra surface coating steps, shortening cycle time and reducing overall manufacturing costs. Industry analysts note that EV safety standards are pushing battery sealing suppliers to upgrade silicone grades. This new LSR fills a gap between general-purpose automotive silicone and high-cost aerospace sealing materials. It has passed IEC 60817 thermal aging and fluid resistance tests, making it suitable for OEM qualification. Manufacturers supplying silicone parts to EV makers can adopt this grade to meet stricter long-duration reliability requirements while keeping cost competitive.

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