L' Oréal Professionnel Tecni. Art Pli priming spray is a heat activated hair styling spray that adds shape fix, grip, hold & gives instant volume to thicken hair. Heat-activated preparation product for strong hold shape & locking in texture. One of L' Oreal Professionnel's most used backstage hair products, try for instant root-lift effect for any bouncy curls, wavy blow-drys, hair ups or use with any style needing longevity. TECHNOLOGY: Film-enhancing polymers are activated by heat to mould the hair into shapes. L' Oréal Professionnel Tecni. Art brings backstage trends to salon, & now to your home. Co-designed with backstage professionals, this styling range will enable you to create your desired look, from sleek to volume, matte texture to shine.