The present invention relates to a fiber mat, preferably a non-intumescent, polycrystalline, needle-punched or stitch-bonded aluminia-silica fiber mat, which contains an organosilicon compound. The fiber mat comprises a fiber blanket which is essentially free of organic binder and which is impregnated with an organosilicon compound selected from the group consisting of siloxane compounds, alkoxy group-containing silanes, hydrolysates and condensates of these compounds, and combinations thereof. In a further embodiment the fiber mat comprises a high friction coating on at least the side of the mat which is to be brought in contact with a pollution control element of a pollution control device. Furthermore, the present invention relates to a pollution control device containing such a fiber mat.