blockade thermo protective serum50ML Blockade Heat Protect Serum shields hair from the intense heat of blow dryers and other heat styling tools, preventing overheating that damages delicate hair fibers. During styling, this nutrient elixir conditions hair and forms a protective layer around the cuticle for a smooth, frizz free finish. The result is naturally soft, smooth hair that is protected against humidity. Free of parabens, sodium chloride, and sulfates. Instructions for use