1-component PU foam
1-component PU foam cans have a market share of 80 percent and therefore dominate the construction foam market in Germany. 1-component PU foams only need to come into contact with normal humidity in the air to foam and harden. These assembly foams do not require any further components. It is recommended spraying the connection surface with water before and after applying the foam to accelerate the hardening process and improve the quality. The 1-component assembly foam hardens from the outside (where moisture impacts first) inwards. In 1-component PU foam cans, isocyanate and polyol are mixed in the can during production: this is then referred to as a pre-polymer. A classic application for the 1-component construction foam is insulating windows.