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detox + repair kit

detox + repair kit

4.7(7,589 ratings)

Best price now

$24.00at PoshmarkChecked 59 min ago

68% under what the other stores charge

Compared across 10 stores. Prices are checked against each store and labelled with when.

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Price facts

  • Lowest price today: $24.00 at Poshmark (checked Nov 12, 2026).
  • Checked at 10 stores.
  • Our take on the detox + repair kit

    The K18 Detox + Repair Kit is a two-piece trial set pairing the Peptide Prep Detox Shampoo with the Leave-In Molecular Repair Hair Mask. The mask uses K18Peptide, a patented peptide the brand says reconnects broken keratin chains, so it is applied to clean hair and left in rather than rinsed out. The shampoo is a clarifying formula meant to strip buildup so the mask can absorb. It suits color-treated, bleached or heat-damaged hair and anyone who wants to try K18 before buying full sizes; the trade-off is that the mask bottle is very small and the set covers only a few uses.

    Best forTrying K18 before buying full sizesColor-treated or bleached hairHeat-damaged, breakage-prone hairTravel and gym-bag use
    Pros
    • Pairs a clarifying shampoo with the K18 leave-in mask
    • Mask uses patented K18Peptide technology
    • Targets breakage, softness and shine
    • Small sizes suit travel and trialing
    • Works on color-treated and bleached hair
    Cons
    • Mask is only 0.17 oz, so the set runs out fast
    • Mask is leave-in, not a rinse-out conditioner
    • Clarifying shampoo can feel stripping on dry scalps
    • Small sizes cost more per ounce than full sizes

    detox + repair kit prices at every store

    • PoshmarkNew

      In stock

      $24.00Checked 59 min ago
      Visit Poshmark
    • eBayNew

      In stock

      $25.00Checked 1 h ago
      Visit eBay
    • SephoraNew

      In stock

      $75.00Free shippingChecked 1 h ago
      Visit Sephora
    • K18 HairNew

      In stock

      $75.00Free shippingChecked 1 h ago
      Visit K18 Hair
    • Kohl'sNew

      In stock

      $75.00Free shippingChecked 1 h ago
      Visit Kohl's
    • BeautyCareChoicesNew

      In stock

      $107.00Free shippingChecked 1 h ago
      Visit BeautyCareChoices
    • MercariNew

      Availability unknown

      $31.50Checked 1 h ago
      Visit Mercari
    • AmazonNew

      Availability unknown

      As an Amazon Associate, Deal.ai earns from qualifying purchases.

      $49.00Free shippingChecked 1 h ago
      Visit Amazon
    • ModeSensNew

      Availability unknown

      $75.00Checked 1 h ago
      Visit ModeSens
    • Beauty Affairs USANew

      Availability unknown

      $134.00Checked 1 h ago
      Visit Beauty Affairs USA

    Also available at

    • K18HairCheck price at K18Hair

    Store links may earn us a commission.

    detox + repair kit price history

    Lowest price we've seen: $24.00 on Nov 13 at Poshmark. Tracked across 10 stores since Nov 13.

    What reviewers say

    • 4.7 / 57,589 ratings

    Ratings are strong overall. Users of the K18 mask line commonly report softer, less breakable hair after several washes, while some find the small mask size runs out quickly and the detox shampoo drying with frequent use.

    What people mention
    • SoftnessPraisedUsers say hair feels noticeably softer after a few applications of the mask.
    • BreakagePraisedMany report less snapping and shedding with continued use.
    • Mask sizeCriticisedThe 0.17 oz mask is used up in a handful of washes.
    • Shampoo drynessMixedSome find the clarifying shampoo leaves hair feeling stripped, especially with frequent washing.
    • Results timelineMixedSeveral say the improvement builds over several washes rather than after one use.

    About the detox + repair kit

    This K18 mini duo pairs the Peptide Prep Detox Shampoo with the Leave-In Molecular Repair Hair Mask. The shampoo cleanses buildup. The mask is made to restore the look and feel of damaged hair.

    Both products use patented K18Peptide technology. They help reduce breakage and improve softness, and they leave hair smoother, shinier and healthier-looking. They are intended for color-treated, bleached or heat-damaged hair. The travel and trial sizes let you try the system before buying full sizes.

    In the box
    Peptide Prep Detox Shampoo, Leave-In Molecular Repair Hair Mask
    Shampoo size
    1.8 oz / 53 mL
    Mask size
    0.17 oz / 5 mL
    Technology
    Patented K18Peptide
    Hair type
    Color-treated, bleached or heat-damaged hair
    Condition
    Brand new, unopened

    Questions and answers

    How do I use the K18 mask?
    Shampoo first, then apply the mask to damp hair and leave it in. Do not rinse it out. Use it every few washes rather than daily.
    Is this the full-size K18 mask?
    No. The mask is a 0.17 oz trial size and the shampoo is 1.8 oz. Both are smaller than the standard retail sizes.
    Will it help bleached or color-treated hair?
    K18 markets the mask for color-treated, bleached and heat-damaged hair, and users with those hair types report less breakage and more softness.
    Is the mask a conditioner?
    No. It is a leave-in treatment, not a rinse-out conditioner. You can still use a conditioner before it if your hair needs one.
    How many uses will I get?
    The mask bottle is very small, so expect only a few applications. The shampoo lasts longer but is still a travel size.
    Where is the detox + repair kit cheapest?
    At Poshmark, for $24.00, 68% under what the other stores charge, as of our latest check.
    What do buyers say about the detox + repair kit?
    Rated 4.7 out of 5 from 7,589 ratings.
    Where can I buy the detox + repair kit?
    10 stores we checked sell it, including Poshmark, Amazon, eBay, Mercari, Sephora.

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    Stores we've priced the detox + repair kit at

    • Kohl's deals and prices
    • ModeSens deals and prices
    • Sephora deals and prices