Repair and protect heat-styled hair with the K18 Repair & Heat Protection Routine. This 3-step system combines molecular repair with advanced heat protection to help strengthen, smooth and defend damaged hair from regular blow-drying and hot tools.

Give damaged, heat-styled hair targeted repair and protection with the K18 Repair & Heat Protection Routine.

Start with the K18 Leave-In Molecular Repair Hair Mask, a concentrated 4-minute treatment powered by patented K18PEPTIDE™ to repair damage caused by bleach, colour, chemical services and heat. It works at the molecular level to restore strength, elasticity, softness and smoothness.

Follow with K18 HeatBounce™ Conditioning Heat Protectant to help protect hair from the damaging effects of heat styling. Powered by resilicore™ technology, HeatBounce helps defend hair from heat through the cuticle and into the cortex, while conditioning and helping reduce the effects of repeated heat exposure.

Finish with the K18 Molecular Repair Hair Oil to smooth frizz and flyaways, enhance shine and provide additional heat protection up to 232°C. Its K18PEPTIDE™ technology works on deeper damage while lightweight oils smooth the hair's surface.

Ideal for damaged hair that is regularly blow-dried, straightened, curled or otherwise exposed to heat styling.

What's Inside

K18 Leave-In Molecular Repair Hair Mask 50ml

A 4-minute leave-in molecular repair treatment that helps reverse damage from bleach, colour, chemical services and heat while restoring strength, softness, smoothness and bounce.

K18 HeatBounce™ Conditioning Heat Protectant 118ml

A conditioning heat protectant designed to defend hair against heat styling while helping reduce breakage and maintain healthier-looking, smoother hair.

K18 Molecular Repair Hair Oil 30ml

A lightweight molecular repair oil that helps repair and strengthen damaged hair, control frizz, enhance shine and provide heat protection up to 232°C.

Product Highlights

• 3-step repair + heat protection routine
• Designed for damaged hair exposed to regular heat styling
• Helps repair existing molecular damage with K18PEPTIDE™
• 4-minute leave-in repair treatment
• Helps strengthen and improve hair elasticity
• HeatBounce™ helps protect from heat damage through the cuticle and into the cortex
• Helps reduce breakage caused by high-heat styling
• Molecular Repair Hair Oil provides heat protection up to 232°C
• Helps smooth frizz and flyaways
• Enhances shine and softness
• Suitable for all hair types
• Colour-safe
• Vegan and cruelty-free

K18 specifically distinguishes HeatBounce from the Molecular Repair Hair Oil: HeatBounce is designed for deeper heat defence, while the oil provides surface-level heat protection alongside molecular repair and smoothing benefits.

How to Use K18 Repair & Heat Protection Routine

Step 1 — Repair

After shampooing, do not condition. Towel-dry hair thoroughly.

Apply 1–3 pumps of K18 Leave-In Molecular Repair Hair Mask, depending on hair length and density. Start at the ends and work towards the roots.

Wait 4 minutes. Do not rinse. Comb through and proceed with your styling routine. K18 recommends using the Mask for the first 4–6 washes after a salon service, then as needed.

Step 2 — Protect

Apply K18 HeatBounce™ Conditioning Heat Protectant evenly through sectioned, towel-dried hair before blow-drying.

For hot tools, apply HeatBounce again to dry hair before using your straightener or curling iron. You can blow-dry or use hot tools immediately after applying HeatBounce.

Step 3 — Smooth & Finish

Apply 1–3 drops of K18 Molecular Repair Hair Oil through mid-lengths and ends.

Use on damp hair before styling or on dry hair as a finishing treatment to smooth frizz and flyaways and enhance shine.

Tip: Start with a small amount of both HeatBounce and Oil and build as needed to avoid over-applying product.

Ingredients

K18 Leave-In Molecular Repair Hair Mask 50ml

Water (Aqua) (Eau), Alcohol Denat., Propylene Glycol, Cetearyl Alcohol, Dicaprylyl Ether, Cetyl Esters, Behentrimonium Chloride, Polysorbate 20, sh-Oligopeptide-78 (K18PEPTIDE™), Hydrolyzed Wheat Protein, Hydrolyzed Wheat Starch, Isopropyl Alcohol, Tocopherol, Phenoxyethanol, Potassium Sorbate, Citric Acid, Fragrance (Parfum), Geraniol, Linalool, Hexyl Cinnamal, Benzyl Alcohol.

K18 HeatBounce™ Conditioning Heat Protectant 118ml

Water (Aqua) (Eau), Cellulose Gum, Isopentyldiol, Propanediol, Cetearyl Alcohol, Isopropyl Palmitate, Sodium Benzoate, C13-15 Alkane, sh-Oligopeptide-78, s-Fruit Fly Oligopeptide-1, (sh-Oligopeptide-78 s-Fruit Fly Oligopeptide-1) Peptides, Laurdimonium Hydroxypropyl Hydrolyzed Barley Protein, Helianthus Annuus (Sunflower) Seed Oil, Oryza Sativa (Rice) Bran Extract, Helianthus Annuus (Sunflower) Extract, Rosmarinus Officinalis (Rosemary) Leaf Extract, Tocopherol, Behentrimonium Chloride, Brassicatrimonium Chloride, Gluconolactone, Arginine, Coco-Glucoside, Lactic Acid, Cellulose, C12-20 Alkyl Glucoside, Citric Acid, Potassium Sorbate, Benzyl Alcohol, Isopropyl Alcohol, C14-22 Alcohols, Fragrance (Parfum), Amyl Salicylate, Benzyl Salicylate, Citronellol, Citrus Aurantium Peel Oil, Dimethyl Phenethyl Acetate, Geraniol, Geranyl Acetate, Isoeugenyl Acetate, Limonene, Linalool, Linalyl Acetate, Pinene, Tetramethyl Acetyloctahydronaphthalenes, Vanillin.

K18 Molecular Repair Hair Oil 30ml

Caprylyl Caprylate/Caprate, Squalane, Persea Gratissima (Avocado) Oil, Helianthus Annuus (Sunflower) Oil, C13-15 Alkane, Undecane, Benzyl Alcohol, Tridecane, Castor Isostearate Succinate, Propanediol, sh-Oligopeptide-78, Fragrance (Parfum), Tocopherol, Cinnamal, Hexyl Cinnamal, Limonene, Linalool.