reinforcing clay mask Reinforcing clay mask for fine, weak hair. Cream with a soft texture, particularly easy to spread, favoring tissue oxygenation. The red clay exerts a mild peeling action on the scalp and frees the pores from any impurity. The iron and copper contained in the clay are important mineral salts for revitalizing the hair shaft. The basic formula including glycerin promotes emollience in the hair structure. Its softening and untangling action makes combing easier.