Gustafs Panel System has been subjected to K fire test and received classification  K1 10, K2 10.

Escape corridors and roof structures have high demands for the use of fire retardant materials. It is of little help however if the non-combustible outer wall or ceiling cladding conveys heat to structures and facilities behind the surfaces which results in fire break out. Claddings with K110/K210 for example protect the underlying constructions for up to 10 minutes in the event of fire. Consequently approval of cladding materials is always associated with an installation system or method. The Gustafs Panels System employs Capax as an integral part of its installation and is approved to classification K110/K210.