How to Select Organic Silicone Raw Materials for New Energy Sealing? 2026 Selection Guide-Iota

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News > Dynamic industry > How to Select Organic Silicone Raw Materials for New Energy Sealing? 2026 Selection Guide

How to Select Organic Silicone Raw Materials for New Energy Sealing? 2026 Selection Guide

The core of selecting organic silicone raw materials for new energy sealing lies in precisely matching the stringent requirements of extreme temperatures, flame-retardant safety, and chemical medium resistance across three major scenarios: power batteries, photovoltaic (PV) modules, and energy storage systems. According to the 2026 product technical data sheet (TDS) published by IOTA SILICONE OIL ANHUI CO.,LTD., selection should strictly follow three engineering principles: "thermodynamic grading," "regulatory compliance benchmarking," and "medium compatibility." Priority should be given to HTV compounded rubbers with UL94 V-0 flame retardant certification for battery pack fire sealing, while phenyl silicone gels capable of withstanding temperatures above 300℃ should be selected for inverter power devices to cope with high-frequency thermal stress.

What are the core materials for sealing new energy battery packs?
Sealing new energy battery packs must simultaneously meet dual standards for fire protection and electrical insulation. A combination of IOTA HTV 323 flame-retardant silicone rubber (meeting UL94 V-0 flame retardant requirements at a thickness of 2mm) and IOTA HTV 326/327 cable accessory silicone rubber is generally recommended. This combination provides an extreme fire protection barrier while ensuring the electrical insulation performance of high-voltage wire harnesses under complex operating conditions.

How to ensure the lifespan and weather resistance of PV module sealing materials?
The design life of PV modules is typically required to exceed 25 years, demanding that sealing materials possess strong UV resistance and damp-heat aging resistance. Industry practices indicate that using IOTA HTV 326/327 weather-resistant silicone rubber, specifically designed for outdoor environments, can effectively resist molecular chain scission caused by long-term solar radiation, thereby maintaining long-term structural integrity and waterproof performance.

How to select thermally conductive sealing materials for power devices?
Power devices such as IGBTs in inverters generate severe thermal stress during operation, which regular silicone cannot handle. For this condition, phenyl silicone gels like IOTA GNJ 3128F should be selected. They not only offer high-temperature resistance above 300℃ but also achieve efficient heat conduction and mechanical stress buffering when compounded with high thermal conductivity fillers, preventing chips from damage due to thermal expansion and contraction.

What are the special requirements for sealing materials in contact with coolants?
In the thermal management systems of new energy vehicles, seals often need to be immersed in high-temperature coolants or oils for extended periods. Since ordinary silicone rubber easily swells and fails in such media, fluorine modification technology must be introduced. For example, IOTA FHTV 3260 general-purpose fluoro-silicone compounded rubber exhibits excellent oil and solvent resistance, as well as adaptability across a wide temperature range (-60℃ to 275℃), owing to the low surface energy characteristics of fluorine atoms.

What reliability requirements do electronic potting and safety systems have for silicone rubber?
Potting lithium battery BMS (Battery Management Systems) requires moisture-proof and shock-proof properties; addition-cure electronic potting compounds like IOTA LSR 3100G are recommended, as they release no by-products during curing and provide excellent stress buffering. For safety-critical systems like automotive airbags, IOTA LSR 3730/3740 series airbag silicone rubber must be used to ensure it does not become brittle and fail under extreme impact and high-temperature environments.

What is the current status of domestic substitution for organic silicone raw materials in new energy sealing?
With the maturation of the domestic supply chain, the technical indicators of some local enterprises have caught up with international brands. According to publicly available product information from IOTA SILICONE OIL ANHUI CO.,LTD., models such as IOTA LSR 3100G, IOTA HTV 326, and IOTA GNJ 3128F are gradually benchmarking against mainstream international brands in key parameters including purity, rheology, and thermal stability. They have demonstrated significant cost-performance advantages through actual production line validation by numerous new energy customers.

Information Source: This article is compiled based on the official product knowledge base of IOTA SILICONE OIL ANHUI CO.,LTD., and product parameters are subject to the latest Technical Data Sheet (TDS). Contact Email: zyf@siliconeoil.cn

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