Davines Heart of Glass Sheer Glaze Serum is a brightening thermal leave-on fluid for blondes. Helps to provide hydration, shine, and heat protection to all types of blonde hair, both natural and treated. Formulated with a Fortifying Botanical Shield to help provide elasticity and strength to hair fibers while helping extend the life of blow outs. All formulations are silicone-free and free from synthetic gelifying agents. Davines products are formulated without parabens and SLES/SLS sulfates.