A Complete Guide to the Best Olaplex Products — Including Those on Sale For Prime Day

Olaplex No. 7 Bonding Oil ($24, originally $30)

Often used as the last step in the Olaplex process, the Olaplex No. 7 Bonding Oil can be applied before or after blowing out your hair to prevent frizz, heat damage, and split ends. If your hair is color-treated, you can also use this product to protect the color's vibrancy. While it's hard to narrow down the overall best Olaplex product, this formula is definitely a winner for us thanks to its highly concentrated yet still lightweight feel. Plus, you only need a few drops of the solution before you can start to see (and feel) a real difference.