In 1K foam, the content of the can reacts with the moisture in the air outside the can. Through this reaction and the formation of carbon dioxide, the foam increases in volume and dries from the outside in. The curing process therefore takes longer.
2K foam cures through exactly 2Komonents, that is, through a chemical reaction, which is why it remains more dimensionally stable. It must be processed very quickly because for the above-mentioned reason it also cures faster. These are the advantages of 2K foam, which is why it is preferably used in the frame installation.