This developer is compatible with all Clairol hair color. Also has an easy to spread; creamy consistency which makes it mix well with all powder, liquid and gel lighteners. It`s a laboratory stabilized mixture that`s guaranteed to provide consistent, predictable results. Designed for standard lightening action and superior gray coverage. Creamy consistency and spreads easily Ideal for bowl-and-brush application Consistent, predictable results Stays fresh for up to 3 years Provides standard lightening action & superior gray coverage