Oil-filled transformers are designed for an operating time in excess of 30 years. There is barely any other machine or system that poses as high requirements to constructors. Manufacturers must plan sizing and design with care. A failure of operations, resulting loss of income and premature, short-term new procurement would be disastrous for operators. For high operating safety, constructors therefore need materials with outstanding properties. We offer plastics specifically suitable for such requirements. They are particularly oil-resilient and have very high dielectrical and mechanical resiliences. They thus contribute to reliability of oil-filled transformers around the world.