The K18 Biomimetic Hairscience Repair, Protect, Smooth Holiday Set is a limited-edition trio of discovery-size hair mask, heat protectant and hair oil. It costs £64.00 in the UK, where Cult Beauty currently lists it as an exclusive, and $60.79 in the US at Image Beauty. It was in stock at Cult Beauty in September 2026, and Cult Beauty describes it as "a good hair day, all wrapped up."
When Did the K18 Repair, Protect, Smooth Holiday Set Launch?
K18 hasn't announced an official release date. The set was in stock at Cult Beauty in September 2026. On 7 October 2026, both Cult Beauty's UK and international listings showed it in stock, and it was also listed at Image Beauty in the US and at Parikart and Concept C in Canada. We're following it alongside other holiday 2026 launches in BeautyTalkClub's beauty news.
Price
- UK: £64.00 at Cult Beauty
- US: $60.79 at Image Beauty
- Europe: €73.60 at Cult Beauty International
- Canada: CA$91.99 at Parikart; CA$92.00 at Concept C
Cult Beauty lists the set as "Worth £82." Based on K18's own UK prices, the set costs £64, while buying the three items one by one would cost £81. In the US, the separate items add up to $80.
K18's own website also sells a smaller limited-edition repair + protect set containing only the mask and HeatBounce. It costs $39 (US) or £40 (UK). Both pages currently show a back-in-stock email sign-up.
What's Inside
- 3 products: 1 leave-in mask, 1 heat protectant, 1 hair oil
- Leave-In Molecular Repair Hair Mask: 15ml
- HeatBounce Conditioning Heat Protectant: 47ml
- Molecular Repair Hair Oil: 10ml
- Total: 15ml + 47ml + 10ml = 72ml
The Products
- Leave-In Molecular Repair Hair Mask (15ml): According to K18, its patented K18PEPTIDE™ helps reconnect broken disulfide bonds and polypeptide chains inside the hair. The brand says it works in four minutes to help reverse damage from colouring, chemical services and heat, leaving softer, bouncier, stronger strands.
- HeatBounce Conditioning Heat Protectant (47ml): A lightweight leave-in made with resilicore™ technology. According to K18, it forms a shield within the hair's cortex and protects up to 450°F (232°C). The brand also says it detangles and conditions, and it claims 85% less breakage after blow-drying.
- Molecular Repair Hair Oil (10ml): A lightweight finishing oil made with avocado oil, sunflower oil, hemisqualane and squalane. K18 says it smooths flyaways, boosts shine, helps control frizz for up to 24 hours and adds heat protection up to 450°F.
Where to Buy
- US: Image Beauty ($60.79)
- UK: Cult Beauty (£64.00, currently listed as exclusive)
- Canada: Parikart (CA$91.99); Concept C (CA$92.00)
- Europe: Cult Beauty International (€73.60, EU delivery)
- Other markets: availability varies by region; more international stockists may be added.
The set is a limited edition, so stock may sell out.
What Makes the K18 Repair, Protect, Smooth Holiday Set Different?
- It covers three steps (repair, protect, smooth), while K18's own repair + protect set has only the mask and HeatBounce.
- The box and bottles are embossed with molecular designs by artist Jen Stark.
- K18 PRO calls it a "limited-edition travel kit," and Image Beauty lists it as a travel set.
Other retailers are selling holiday haircare sets this season too. Space NK Holiday Kits 2026 include two haircare kits with Olaplex, Oribe and ghd, and the Crown Affair The Vault Holiday 2026 Hair Care Set bundles seven hair care items.
Formula and Packaging
The formulas are existing K18 products; what is new for the holiday season is the packaging, with Jen Stark's molecular artwork and a removable sleeve that makes the set ready to gift. K18 lists K18PEPTIDE™ as sh-Oligopeptide-78, and it appears in all three formulas. According to K18, resilicore™ is inspired by resilin, a natural protein that withstands extreme temperatures. The brand also says HeatBounce doesn't need heat to activate, and hot tools can be used straight after applying it. For the oil, K18 PRO claims 104% more shine and a 78% reduction in split ends.
How to Use
K18 says to shampoo, skip conditioner and towel-dry thoroughly. Then apply 3 to 9 pumps of the mask from the ends up to the roots and leave it on for four minutes without rinsing. Next, brush HeatBounce through sectioned hair, using a small amount so hair feels soft rather than coated, and reapply it on dry hair before hot tools. Finally, work 1 to 3 drops of oil into damp mid-lengths and ends, wait four minutes and style, then add another 1 to 3 drops to dry hair as a finisher.
Sources
- K18 PRO: repair, protect + smooth set product page
- K18 official sites: repair + protect set (US, UK)
- Cult Beauty: UK listing and international listing
- Retailer listings: Image Beauty, Parikart, Concept C
