The Kérastase Masque Force Architecte is an intensive mask treatment for weak, damaged or brittle hair. This rich formula penetrates deep into the fibre of the hair to moisturise and rejuvenate, making it the perfect treat for thirsty, weakened hair that\'s suffering as a result of heat styling, dying or pollutants. Kérastase\'s Masque Force Architecte treatment has been specially designed to nourish, heal and fortify damaged hair at erosion levels 1-2, which is a scientifically formulated scale created by Kérastase for analysing hair damage. With the active ingredient Vita-Ciment® – which contains Intra-Cylane, Ceramide R, Pro-Keratin and Sève de Résurrection – this mask revives and renews the hair from root to tip, strengthening the hair fibre to protect against split ends, brittleness and breakage. After your usual hair-care routine, apply 1 or 2 walnut-sized amounts to towel-dried hair. Massage into lengths and ends and leave on for 5 to 10 minutes to allow the creamy formula to penetrate into the strands. Rinse thoroughly to reveal noticeably soft, shiny and revived hair.