BC Bonacure pH 4.5 Color Freeze Treatment is a rinse-out hair mask built around pH 4.5 Balancer Technology — a combination of lactic acid and calcium hydroxide that brings color-treated hair back to its optimal, slightly acidic pH. At that pH the cuticle sits tighter and flatter, which helps lock color pigment in and reduces the fading, dullness, and rough texture that come with repeated lightening, highlighting, or coloring. Vegan keratin and conditioning agents fill in gaps along the hair's outer layer to add strength, shine, and elasticity back to porous, over-processed strands.
It's meant as an occasional deep-conditioning step rather than a daily conditioner — worked through towel-dried hair, left on briefly, then rinsed — and pairs well with the rest of the Color Freeze shampoo and conditioner for anyone maintaining vibrant color between salon visits.