To obtain an absolutely perfect foam structure, the work surface should be moistened before and after application. An important condition when using foam is sufficient for polymerization humidity at the application site. The pre-polymer in the container, when it exits the nozzle of the mounting gun, reacts with moisture in the air and on the surface of the application. Full line of professional polyurethane foam VASmann, thanks to its unique composition, it is capable of efficient polymerization under conditions of minimum humidity, with the formation of a smooth, fine-pored structure of the finished product. But despite this, in order to obtain the highest quality mounting seam and even more significant increase in heat and sound insulation performance, our technologists recommend moistening the mounting seam before and after applying the product with a spray. This will provide a high-quality mounting seam and reduce the time of polymerization of the product.