Rail Mat is constructed from three layers that are bonded together. The top layer is a black or dark-grey UV-stabilized needle punch and the core is blue, Oil only meltblown polypropylene. The bottom layer is a heavy clear impervious plastic that prevents oil spills from leaking through to the ground. Rail Mat is primarily designed to protect railway yards or transport facilities whilst maintenance work is being carried out. It is also suitable for any heavy industrial application such as oil rigs or military maintenance facilities.