How do you use K18 Leave-In Molecular Repair Hair Mask?

Apply to damp, towel-dried hair and leave it in without rinsing. The brand says to use it consistently over the first few washes for best results.

How is it different from Olaplex No.3?

Olaplex No.3 is applied before shampooing and rinsed out. K18 is a leave-in used after washing, so it skips the rinse step.

It can work on fine hair, but use a small amount and keep it away from the roots to avoid a weighed-down feel.

That depends on hair length and thickness. Short hair gets more applications; long or thick hair uses it up quickly.

It is designed for hair with damage from bleach, color, heat or chemical treatments. On healthy hair the visible difference is smaller.

At Walmart, for $18.46, 29% under what the other stores charge, as of our latest check.

Rated 4.9 out of 5 from 19 ratings.

13 stores we checked sell it, including Walmart, eBay, Target, The Studio, zitomer.com.

$18.46at WalmartChecked 1 h ago

29% under what the other stores charge

Compared across 5 stores. Prices are checked against each store and labelled with when.