GIAN Anti-slip. Safety cast in concrete GIAN anti-slip formliners : attractive, thin texture mat adhered inside concrete mould GIAN is the name of the innovative texture mat from Compañero. This texture mat is easy to handle and can be used repeatedly. GIAN 1 large diamond texture (35 x 14 mm) The GIAN 1 large diamond texture has been improved significantly from the old small diamond* pattern. A wider drainage groove now carries away rainwater even more quickly. This drainage process is enhanced when the concrete surface is walked on. The rolling action of the shoe presses the water into the groove. In other words, the GIAN 1 large diamond texture effectively combats aquaplaning in two ways. Another improvement to the GIAN 1 texture is the enlarged diamonds. The new dimensions are 35 x 14 mm. This produces a more attractive pattern since the enlarged texture is easier on the eyes. * The small 25 x 9 mm diamond version is still available.