Composite Materials Core Material C is an ideal material for making permeable surfaces. Combined with IG040 slabs, it allows the creation of parking spaces or even stable access routes while maintaining soil permeability in urban areas. Flexible and fitted with thick walls, IG040 tiles guarantee the strength and longevity of your projects. Between the walls of the slab, the gravel remains in place and increases the stability of the whole. IG040 tiles, easy to install, are delivered pre-assembled by 4 and are assembled using a simple and robust fixing system. The lightness of the slabs and their preassembly ensure a quick installation allowing you to carry out several hundreds of m² per day.