This portable spray kit for two-component polyurethane foam enables quick and effective insulation without other specialist equipment. It consists of two pressure vessels — cylinders fitted with a spray gun that acts as an applicator. The foam applied in this way has the same parameters as closed-cell foam produced using professional equipment. It exhibits excellent adhesion to such materials as concrete, plaster, brick, wood, metal and most plastics. The system is designed for small-scale investment projects and specialised applications.