PUR hot melts have been developed in imitation of EVA and polyolefin hot melts to obtain a stronger, more constructive bond to furniture and building materials. This hotmelt is also more resistant to extremely high and low temperatures. PUR hot melts are reactive and must therefore be processed in a hermetically sealed packaging and adhesive system. The crosslinking component is an environmentally unfriendly additive, which can be a disadvantage compared to thermoplastic hotmelt adhesives.