FIRE RESISTANT FOAM FACER

The present invention relates to a foam facer having a certain flame retardancy. The foam facer (1) is a laminate comprising: - a first aluminum layer (10) of aluminum or an aluminum alloy; - a first polyethylene-containing polymer layer (20); - a sheet of paper (30); - a second polyethylene-containing polymer layer (40); and - optionally, a second aluminum layer (50) of aluminum or an aluminum alloy. The first and/or the second polyethylene-containing polymer layer (20, 40) contain(s) independently from another 10 to 60 wt.% of a mineral filler, based on the total weight of the respective layer. The mineral filler is selected from the group consisting of calcium carbonate, calcium magnesium carbonate, talc, clay, a magnesium hydroxide compound, an aluminum hydroxide compound and combinations thereof. The mineral filler has a mean particle diameter D50 of 0,5 µm or more and 10 µm or less. The present invention further relates to a foam panel or a foam board (100) comprising said foam facer (1) and the use thereof.