Merlin Professional is one of Fabriahs most popular hair care brands, combining art & science to achieve unrivalled professional results. Due to its strength, this sealer is to be used weekly to re-balance & control the hair. The Botanical Plus Magnesium Weekly Body Support Power Sealer is designed to be used on hair that is naturally fragile or has been heavy chemically altered. This protein-based treatment with Hydrolyzed Mucopolysaccharides helps strengthen, lubricate & neutralise the damaging effect of chemically altering hair leaving it strong with exceptional shine. To use this product, apply to damp, clean hair, comb through & leave on for 2-5 minutes before washing out. Merlin Sealers also have the additional benefit of protectin the hair against the environment for up to 3 days. All Merlin products are highly concentrated so a little goes a long way.