The Haysite HST II Sheet is a fiberglass-reinforced thermoset polyester laminate, designed for high-performance electrical insulation and mechanical durability. Meeting GPO-1 industry standards, this material ensures reliability in demanding applications requiring exceptional thermal resistance. The HST II delivers superior mechanical performance, while its high-temperature polyester composition allows for excellent retention of electrical and mechanical properties under extreme heat conditions. It is widely used in high-voltage transformers and D.C. motors, where stability, strength, and insulation integrity are critical for optimal functionality.