The multi-airjet guns were designed for fibered or heavy aggregates used in grouts, stucco, plaster and industrial coatings. Several models of the multi-airjet gun are available with changeable orifices for controling spray pattern and to minimize wear of the nozzle.
The single-airjet guns also have changeable orifices for spray pattern control and atomization control of the overall texture. These guns are designed for fine atomization (required in waterproofing and some aesthetic coatings) and lighter materials like fireproofing or acoustics. Single-airjet guns require considerably less volume of air for atomization, but will pass less material for a reduced flow.