Biolage ColorLast Gallon is the backbar-sized version of Biolage's color care shampoo and conditioner, sold by the gallon in either formula. It is built for color-treated hair that fades faster than you'd like, and for salons or heavy home users who go through product quickly enough that buying small bottles over and over stops making sen
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The Biolage Colorlast Shampoo is a high quality product. It arrived packaged very well & safe from leakage. I highly recommend this product & your delivery!
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Colleen · 12 days ago
Great shampoo!
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Robyn · September 25, 2026
This is my favorite shampoo and conditioner because it gives my dry, color-treated hair the softest results. It’s smells amazing too, which is important to me. I’ve been using this product for years now without ever feeling like I need to switch it up. The giant gallon bottle allows me to refill my “pretty” pump bottles in my fancy shower. The only thing that would make this better is even less plastic waste.