PREFA does not supply PE cores in its aluminium composite panels. It uses high-quality FR cores. FR stands for ‘fire-retardant’ (reaction to fire classification according to EN 13501-1 ‘B-s1, d0’). In addition, PREFA aluminium composite panels are also supplied with a non-flammable A2 core. Details on the fire classification of PREFA façades can be found in the PREFA information sheet on fire protection.