Curly HairLeave-In Conditioner
Leave-In Molecular Repair Hair Mask — Reddit Reviews
by K18
Updated November 3, 2026
Leave-in repair mask visibly thickens ends and helps prevent split ends; pricey.
What the community says
A leave-in repair mask built around SH-Oligopeptide-78, hydrolyzed wheat protein, and conditioning fatty alcohols for chemically or heat-damaged lengths. It suits people chasing thicker-looking ends and fewer splits, though Alcohol Denat, fragrance, and premium pricing make routine use divisive.
What this means for you
What people love
Product details
hair_type
Skin type data limited
Where to buy
Real Reddit threads — 4 mentions across 4 threads
K18 Leave-In Molecular Repair Hair Mask on Reddit, in one place — 4 threads from r/FancyFollicles, r/curlyhair and 2 more, summarized.
“K18 K18 K18 followed by a deep conditioner that has protein AND moisturizing ingredients.”
Positive
“You should buy some K18 (not T18). It's not cheap, especially compared to the grocery store products you have been using, but it does a great job at bonding the cuticle back together”
Positive
“I bought the K18 hair mask but I just wanted to know if my curls can actually come back from this and what I could do, or if Im just going to have to wait it out.”
Mentioned
“Use k18 to help with any possible heat damage (not necessary but since you have it why not), then after 4 mins deep condition.”
Mentioned
“K18 leave in mask hands down”
Positive
“Then I finally splurged and got k18 and the difference is staggering.”
Positive
“My ends are actually thick now.”
Positive
“It's been 2 months since my last chop and I can barely find any split ends.”
Positive
“I also just bought Curls blueberry bliss mask and K18's leave-in since olaplex hasn't really been impressing me.”
Mentioned
