Pureology perfect 4 platinum reconstruct repair for blondes 200ml is an intensive treatment that repairs and strengthens blonde hair that has become damaged through high lifting or highlighting the keravis enriched formula works from deep within the cuticle to balance our porosity leaving your locks with improved elasticty softness and shine lm directions of use apply to clean wet hair leave on for 2 5 minutes rinse thoroughly use a couple of times a week or as often as neede