Form: This specification covers polyurethane systems consisting of an isocyanate component and other components containing a polyol and other ingredients which, when mixed and cured, produce thermosetting, rigid, cellular products.

Application: Primarily for foam-in-place applications such as electronic encapsulating or miscellaneous packaging for use from -70° to +105°C (-95° to +225°F).

Classification: The resin system is classified by density of the cured product as shown in Table I wherein each material is defined by nominal bulk densities of foam in the range 2 - 26 lb per cu ft (32 - 416 kg/m³) in increments of 2 lb per cu ft (32 kg/m³).