Our bond building treatment restores even highly damaged and weakened hair from within by up to 98%. To protect the hair, it significantly reduces and prevents hair breakage which was clinically tested in comparison to hair treated with a standard shampoo. The Bond Builder by KERASILK strengthens the hair structure from the inside, for up to 20x stronger hair, which leads to a healthy-looking and smooth look. This hair treatment significantly improves the elasticity of each hair strand (clinically tested in comparison to untreated hair) and provides natural shine and increased smoothness.