Kérastase First Fundamental Serum 90 ml

The Première Fundamental Filler Serum is a leave-in serum that fills hair, prevents breakage and protects it from heat tools, leaving it shiny and strong.

The calcium in hard water can further damage already damaged/weakened hair. Being more porous, damaged hair absorbs 3 times more calcium than natural hair and enters a cycle of persistent damage.

This serum provides hair with a dual restorative action: its light and creamy texture seals the ends. This anti-frizz serum seals and plumps hair strands, leaving hair shiny and strong. Hair is protected from excess calcium, humidity, and heat up to 230°C*.

Controls frizz for 72 hours* and leaves hair soft, supple, and manageable. For extra care for damaged hair, use the Fundamental Filler Serum with the rest of the Première range.

Start your routine by layering the Ultra-Repairing Decalcifying Concentrate and the Repairing Decalcifying Bath. Then apply the Repairing Filler Mask or the Repairing Fluidity Fondant to the lengths and ends. Finish by applying the Fundamental Filler Serum to complete your hair repair.

Benefits: Prevents humidity Nourishes deeply Eliminates frizz Get softer, smoother hair 2x softer hair 99% more strength* Anti-frizz for 72 hours Heat protection 230°C
 *Instrumental test, after application of the Fundamental Filler Serum Directions for use: Apply to towel-dried hair, without rinsing. Then, dry and comb