The Challenge
The customer’s existing EPDM seals hardened below -20°C, losing IP68 rating in cold climates. They needed a seal maintaining compression force across -40°C to 150°C with a 10-year design life, validated per their vibration and thermal cycling protocol.
Our Solution
We developed a low-temperature LSR compound with glass transition well below -50°C, validated compression set (<15% at 150°C/22h) and ran the customer’s full thermal cycling + vibration protocol on production-representative parts.
Results
- ✅ IP68 maintained across full -40°C to 150°C range
- ✅ Compression set below 15% at 150°C/22h
- ✅ Passed customer vibration & thermal cycling protocol
- ✅ Annual volume: 2M+ seals across 3 battery platforms
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