Double-layer compressed vibrated concrete paving slabs CE marked, produced and tested according to EN 1339, consisting of four rectangular and square sizes 20x20 - 20x40 - 40x60 cm, thickness 8 cm, double-layer finish. The special double-layer finish is made with selected aggregates that guarantee high performance in terms of abrasion resistance, durability and long-lasting colouring. The slabs, produced with natural (non-recycled) aggregates and non-organic oxides, have a homogeneous finishing layer with a variety of colours and an irregular sharp-edged visible surface typical of natural stone, without chamfers. The joints between the slabs must be larger in size to improve stability. The finishing layer is treated in the mass (NO SUFERFICIAL FILM) to guarantee a hydrophobic effect with STONE TECH treatment. Greater stability of the flooring is guaranteed by the SPINTECH self-locking technology.