K18 Leave-In Molecular Repair Hair Mask
Peptide Hair Treatment Mask for Bleach, Color, Chemical + Heat Damaged Strands - Immediate + Lasting Damage…
Price as of 2026-06-20. Check Amazon for the current price.
Quick Decision
Is This Right For You?
- •Risk-averse buyers — 20,573+ reviews give a highly reliable picture
- •Top 1% bestseller in hair masks — proven market demand
- •Rating sits in the bottom 10% of hair masks — higher-rated options exist
- •Arvazallia Hydrating Argan Oil Hair Mask and Deep Conditioner offers a better rating (4.5/5) at a similar or lower price ($15)
- •Shea Moisture SheaMoisture Jamaican Black Castor Oil Treatment — 59% cheaper at $12 (Score A)
- •BioSilk Silk Therapy Original — higher rated at 4.8/5 ($26)
📊 Based on data analysis of 94 products in this category.
Mubboo Score: B+
How we calculate the Mubboo Score
Quality (45%): customer rating, normalized to a 10-point scale
Popularity (35%): review volume vs the category leader, log-scaled
Value (20%): price position vs other hair masks
Computed from live Amazon rating, review count, and price across 94 hair masks · last refreshed 2026-06-20.
How It Compares
This Product K18 Leave-In Molecular Repair Hair Mask | Most Popular Arvazallia Hydrating Argan Oil Hair Mask and Deep Conditioner | Best Rated BioSilk Silk Therapy Original | Best Value Shea Moisture SheaMoisture Jamaican Black Castor Oil Treatment | |
|---|---|---|---|---|
| Price | $29 | $14.99 | $25.58 | $12 |
| Rating | 4.3/5 | 4.5/5 | 4.8/5 | 4.6/5 |
| Reviews | 20,573 | 66,379 | 25,709 | 9,952 |
| Mubboo Score | B+ | A | A- | A |
What People Say
Synthesized from 40 reviews · 100% verified purchases.
These masks are effective for most hair types seeking deep hydration and frizz control, but if you have extremely dry or color-treated hair, consider layering with other treatments. Use sparingly to prevent buildup, and check for strong scents if you're sensitive.
- Intense Softness and Hydration
- Lightweight and Non-Greasy Finish
- Frizz Control and Shine
- Pleasant and Long-Lasting Scent
- Excellent Value - A Little Goes a Long Way
- Overpowering Scent for Sensitive Users
- Can Weigh Hair Down or Become Greasy with Overuse
- Not Sufficient as Standalone for Severely Dry or Color-Treated Hair
Related Video Reviews
- 📹 The BEST Hair Masks for Healthy Hair! Which One Is Best For You? — Abbey Yung
- 📹 How to Fix Hair Damage? (Top 10 Hair Repair Products with Science-Backed Results) — Sareena Karim
- 📹 The ONLY hair masks you need. — Isabella Demarko
About K18
- 5 products in our database
- Average rating: 4.4/5 across all products
- Price range: $27 – $75
- Categories: hair-masks, hair-treatment-oils, shampoo-and-conditioner
Other hair masks
Bottom Line
K18 Leave-In Molecular Repair Hair Mask earns Mubboo Score B+. Priced at $29 — a mid-range option, above the category average of $26. Rated 4.3/5 from 20,573+ reviews. Strong buy if: risk-averse buyers, top 1% bestseller in hair masks. Skip if: rating sits in the bottom 10% of hair masks — Arvazallia Hydrating Argan Oil Hair Mask and Deep Conditioner (Score A, $15) may fit better.
Frequently Asked Questions
Is the K18 Leave-In Molecular Repair Hair Mask worth buying in 2026?
It earns a Mubboo Score of B+, with a 4.3/5 rating from 20,573 reviews — better than 10% of hair masks we track.
How much does the K18 Leave-In Molecular Repair Hair Mask cost?
It is currently $29 — mid-tier pricing for hair masks.
How does the Leave-In Molecular Repair Hair Mask compare to other hair masks?
The category's most-reviewed alternative is the Arvazallia Hydrating Argan Oil Hair Mask and Deep Conditioner (4.5/5, 66,379 reviews, $14.99). The Leave-In Molecular Repair Hair Mask carries a Mubboo Score of B+ vs A.
Sources & References
Mubboo may earn a commission on purchases made through affiliate links. This does not affect our Mubboo Score, product rankings, or editorial judgments. Prices are accurate as of the last sync (2026-06-20) and may change.