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K18 Biomimetic Hairscience

HeatBounce Conditioning Heat Protectant

The future of heat protection: a lightweight leave-in that shields hair from heat up to 232°C (450°F) while detangling, softening, and conditioning, with 85% less breakage after blow-drying.

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~~$69.00~~ $65.00

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Estimated delivery between October 31 and November 02. Order within .

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HeatBounce™ is a leave-in conditioning heat protectant that goes deeper than ever before. It’s powered by K18’s resilicore™ heat-shielding technology, inspired by proteins in nature that withstand extreme temperatures. Traditional heat protectants only coat the cuticle. Resilicore™ reaches into the hair’s inner cortex, where heat damage happens, and forms a protective shield that fortifies hair from within.

Heat protection: It shields hair from blow-dryers, flat irons, and curling irons up to 232°C (450°F).
Less breakage: In testing, hair showed 85% less breakage after blow-drying.
Conditions and detangles: A lightweight conditioning blend softens, detangles, and improves manageability, even on damaged hair, without weighing it down.
Everyday protection: It also helps defend against UV, environmental stressors, and brushing damage.

Even lower heat can cause dullness, dryness, colour fade, and frizz, so HeatBounce is the first step anytime you style with heat. It’s suitable for all hair types and textures, and safe for extensions.

Before blow-drying: Section towel-dried hair and spray evenly throughout. Start with about 3 sprays.
Brush or comb through for even distribution.
Before hot tools: Apply to dry hair before using a flat iron or curling iron.
Less is more. Start small and add more only if needed. Hair should feel soft and tangle-free, not coated.
In a K18 routine: Apply after the 4-minute K18 Leave-In Molecular Repair Mask wait time. Reapply before hot tools, and finish with K18 Molecular Repair Hair Oil for shine.
Between washes: Refresh with AirWash™ dry shampoo, then use HeatBounce before styling touch-ups.

All hair types and textures, including fine, thick, curly, colour-treated, and damaged hair, plus extensions. It’s ideal for anyone who regularly blow-dries, straightens, or curls their hair.

Ingredients

Water (Aqua/Eau), Cellulose Gum, Isopentyldiol, Propanediol, Cetearyl Alcohol, Isopropyl Palmitate, Sodium Benzoate, C1315 Alkane, 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.

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HeatBounce Conditioning Heat Protectant

~~$69.00~~ $65.00

Why K18?

Clinically Proven

In clinical trials, one K18 salon treatment during bleaching restored hair to 91% of its original strength and 94% of its original elasticity.

Results in 4 Minutes

Reconnects broken keratin chains and bonds in just 4 minutes, for hair that looks and feels like new.

Patented Science

Powered by the patented K18Peptide™, the world’s first patented biotech treatment that repairs chemically damaged hair from the inside out.

Clean Formulas

Vegan, cruelty-free and gluten-free, made without sulfates, parabens, silicones or phthalates, and packaged in recyclable materials.

FAQs

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Products

Yes! We are located at 220 Bloor St West and we are always happy to see you and to provide you with personalized tips and products for your hair

Yes, our Keune products can be refilled! Come by our salon and help us keep the planet cleaner.

When you book a hair service, you always have the option of adding a hair mask, which is always targeted to your specific hair goals / hair type. We also offer scalp detox treatments in order to help combat product build-up and other minor scalp issues.

Our specialists have over 10 years of experience in haircare and they hand-pick the most effective products on the market, doing the research so you do not have to.

Shipping

We ship from our flagship location in Toronto.

We do not currently offer worldwide shipping.

Message us ASAP if you need to make changes to your order and we will do our best to accomodate.

Orders are generally shipped within 48 hours (Monday - Friday) using Canada Post.

Canada Post's delivery standard is 2 – 5 business days.

TMPT(D) offers FREE shipping within Canada on ALL orders over $ 89. Flat rate shipping fee of $15 applies to orders under $ 89.

We also offer local delivery within the city of Toronto for a flat rate of $10, delivery time 1-2 business days.

Returns and exchanges will be accepted if you contact us within 7 days of receiving the delivery. If you would like to return or exchange an item, please email us with your name, order number and reason for return. We will provide you with details on how to return your item. Exchanges may be for product or store credit. The cost of shipping is non-refundable.

Refunds will be issued once the product has been received in good condition.

Hygiene

All of our manicure tools are disinfected in a UV machine after every client and all of our haircare and hairstyling tools are also disinfected after every client.