Parker’s CoolTherm SF-1000 targets thermal runaway in cylindrical cell battery packs
Category: Adhesives & Bonding, Automotive, Batteries, Commercial Vehicles, Components & Technology, Materials, Materials & Manufacturing, Policy & Market, Regulation & Policy, Thermal Management


CoolTherm SF-1000 applies as a liquid fire blanket directly to cylindrical cells, replacing labor-intensive die-cut mica sheets at lower overall cost
(Image courtesy of Parker Lord)
Parker’s Assembly and Protection Solutions Division has launched CoolTherm SF-1000, a liquid-dispensed silicone foam designed to mitigate thermal runaway propagation in cylindrical cell EV battery packs. The material acts as a fire blanket within the pack structure, giving manufacturers a lower-cost alternative to die-cut mica sheets without compromising safety intent.
CoolTherm SF-1000 addresses battery pack thermal runaway risk
Battery pack designers building cylindrical cell systems have long relied on rigid barrier materials to slow or stop thermal runaway propagation. Mica sheets, aerogel-based solutions, and intracellular foams are common approaches, but each brings processing trade-offs. Die-cut mica in particular requires labor-intensive handling and drives up assembly cost. CoolTherm SF-1000 takes a different route. Parker formulates the material as a non-expanding foam, meaning it stays precisely where it is dispensed rather than migrating through the pack architecture. According to Parker, many competing expanding foams need complex mixing equipment and prove difficult to manage in continuous mass production. The non-expanding behavior removes that variable from the assembly line. The product is applied as a liquid, which simplifies placement and integration into cylindrical cell battery pack applications. Parker and UL testing support the claim that SF-1000 helps mitigate thermal propagation, and the material is designed to minimize interference with surrounding pack components. Total cost of ownership improves, Parker says, because the liquid-dispense process replaces a labor-intensive die-cut operation at the same level of safety.
Liquid-dispensed format improves EV battery pack manufacturability
Beyond the fire blanket function, the liquid-dispense format has direct implications for manufacturing throughput. Engineers face pressure to improve safety without adding unnecessary process complexity or cost – a tension Parker identifies directly as the design brief for SF-1000. A material that dispenses cleanly and stays where placed reduces that complexity without demanding new assembly infrastructure. Parker positions SF-1000 within a broader portfolio approach to EV battery safety. The CoolTherm line already covers thermally conductive gap fillers, structural adhesives, and potting materials for battery module assembly. SF-1000 extends that portfolio into thermal barrier and propagation mitigation territory, giving battery designers and sourcing teams an alternative to rigid, expensive barrier materials that can complicate assembly. Eric Dean, Business Development Manager at the APS Division, said the material is designed to serve electrification needs across all markets using lithium-ion batteries, targeting both safety performance and reduced cost and complexity for customers.
Parker to present CoolTherm portfolio at EV Tech Expo Stuttgart
Parker will present the full CoolTherm portfolio at the Electric and Hybrid Vehicle Technology Expo Stuttgart at Booth 1-G20. The showcase will cover thermal management materials, structural adhesives, coatings, sealing and gasketing solutions, and EMI shielding and grounding solutions alongside the SF-1000 launch. The company draws on more than 60 years of experience in adhesives and thermal management serving global EV and industrial electrification markets. The timing is significant: China’s GB38031-2025, effective July 1, 2026, requires EV batteries to prevent fire or explosion for at least two hours during thermal runaway – replacing a previous standard that required only a five-minute warning. For electric vehicle manufacturers, materials that demonstrably address thermal runaway propagation move from desirable to necessary.
Stay ahead in the electrification revolution. Explore more breakthroughs from leading innovators in electric commercial transport – visit our news page.