Abstract: A nozzle suitable for mixing atomized first and second components of a resin exterior to the nozzle and combining the atomized and combined resinous components with a base material such as a fibrous or granular insulation material. The nozzle comprises a front plate and a back plate, the back plate individually receiving under pressure the first component and second component of the resin, a base material and an air supply. The front and back plates are secured in registry to each other so that central passageways in the front and back plates communicate the base material through the nozzle to be exhausted onto a surface. The air supply is communicated through the back plate to a continuous channel on the surface of the back plate in registry with the front plate and the first and second components of the resin are transmitted through the back plate by means of single passageways on either side of the continuous air channel.