Rea Nysol heavy build is a dual film solderable insulation composed of modified polyurethane resins with a polyimide (nylon) overcoat. The nylon overcoat provides a significant reduction in the wire's coefficient of friction aiding both windability and the production of compact coils. Polyamide (nylon) overcoat provides excellent mechanical protection during winding and insertion. - Nysol heavy build has a continuous operating temperature of 155 °C and is formulated for applications where a solderable insulation is desired. Excellent dereeling and windability on high speed and/or automated winding machines. Solderable without prior to insulation removal.