NEV Penetration Surpasses 50%: Potting Compound Demand Is Being Rewritten
In the first half of 2026, China’s new energy vehicle penetration rate crossed 50% for the first time. Behind that number, upstream material supply chains are going through a structural shift. For potting compounds, it is not just about higher volumes. The requirements coming from customers are changing.
NEVs are far more electronics-intensive than combustion vehicles. The three core systems, plus onboard chargers, DC-DC converters, and high-voltage distribution boxes, mean each vehicle uses roughly two to three times more potting compound. But volume is only the surface story. What is really shifting are the specifications.
Inverters are a good example. With silicon carbide modules gaining traction, the upper operating temperature limit is moving from 150°C toward 200°C. Whether a potting compound holds up at 200°C long-term has become a question that cannot be skipped. High-voltage architectures are also advancing. In an 800V system, materials with dielectric strength below 15 kV/mm or volume resistivity that drifts below 10¹³ Ω·cm are simply not in the conversation. It used to be that buyers asked about price and lead time first. Now they go through the datasheet line by line.
Several trends are unfolding at once.
Thermal conductivity is moving from a rough requirement to something that needs precise matching. Different components generate very different amounts of heat. A BMS might need around 1.0 W/m·K. An inverter power module might need 2.0 to 4.0 W/m·K. Addition-cure silicone series covering 0.5 to 4.0 W/m·K are now on the market, with grades mapped to specific thermal ranges. That means engineers can match the spec to the actual load rather than paying for over-engineered performance.
Flame retardancy is shifting from a bonus to a baseline. UL94 V-0 has long been a nice-to-have in consumer electronics. In automotive, it is becoming a requirement. Full-series V-0 certification means OEMs and Tier-1 suppliers do not need to run separate flame retardancy qualification for each material. That saves both time and testing costs.
On the process side, a 1:1 mix ratio plugs directly into standard two-component dispensing equipment. No separate flow rate settings for each component. When a line is running at high cadence, every bit of setup time saved matters.
Downstream changes eventually push upstream improvements. Covering multiple thermal conductivity ranges, meeting flame retardancy standards, delivering batch-to-batch consistency, and offering reliable processability — these are becoming prerequisites for winning orders. The window is probably the next two to three years.
Fifty percent penetration is not the ceiling. Intelligent driving, high-voltage fast charging, and solid-state batteries are all still advancing. Vehicle electronics content will only deepen. Potting compound demand is nowhere near its peak. The players that move ahead will be the ones whose products hold up under scrutiny over the long haul.
