Front view of Garnier Fructis Sleek & Stay Heat-Activated Serum bottle.Front view of Garnier Fructis Sleek & Stay Heat-Activated Serum bottle.Front view of Garnier Fructis Sleek & Stay Heat-Activated Serum bottle. Before and after use of Sleek & Shine system.Before and after use of Sleek & Shine system.Before and after use of Sleek & Shine system. Garnier Fructis Sleek & Stay Heat-Activated Serum bottles highlighting benefits: water-resistant, heat protection up to 450°F, non-greasy.Garnier Fructis Sleek & Stay Heat-Activated Serum bottles highlighting benefits: water-resistant, heat protection up to 450°F, non-greasy.Garnier Fructis Sleek & Stay Heat-Activated Serum bottles highlighting benefits: water-resistant, heat protection up to 450°F, non-greasy. Step-by-step instructions for using Garnier Fructis Sleek & Stay Heat-Activated Serum.Step-by-step instructions for using Garnier Fructis Sleek & Stay Heat-Activated Serum.Step-by-step instructions for using Garnier Fructis Sleek & Stay Heat-Activated Serum. Garnier Fructis Sleek & Shine routine with shampoo, conditioner, and heat-activated serum.Garnier Fructis Sleek & Shine routine with shampoo, conditioner, and heat-activated serum.Garnier Fructis Sleek & Shine routine with shampoo, conditioner, and heat-activated serum. Two women with ultra glassy, sleek hair, showing results that last up to 5 washes.Two women with ultra glassy, sleek hair, showing results that last up to 5 washes.Two women with ultra glassy, sleek hair, showing results that last up to 5 washes. Full Garnier Fructis Sleek & Shine product line: shampoo, conditioner, anti-frizz serum, and heat-activated serum.Full Garnier Fructis Sleek & Shine product line: shampoo, conditioner, anti-frizz serum, and heat-activated serum.Full Garnier Fructis Sleek & Shine product line: shampoo, conditioner, anti-frizz serum, and heat-activated serum. Green capsule with Argan Oil and Vegan Keratin ingredients labeled.Green capsule with Argan Oil and Vegan Keratin ingredients labeled.Green capsule with Argan Oil and Vegan Keratin ingredients labeled. Garnier "Greener Beauty" commitments: Cruelty-Free, Vegan Formula, 100% Recycled Plastic bottle.Garnier "Greener Beauty" commitments: Cruelty-Free, Vegan Formula, 100% Recycled Plastic bottle.Garnier "Greener Beauty" commitments: Cruelty-Free, Vegan Formula, 100% Recycled Plastic bottle. Back of Garnier Fructis Sleek & Stay Heat-Activated Serum bottle with product details and ingredients.Back of Garnier Fructis Sleek & Stay Heat-Activated Serum bottle with product details and ingredients.Back of Garnier Fructis Sleek & Stay Heat-Activated Serum bottle with product details and ingredients. ;

Garnier Fructis Sleek & Stay Heat-Activated Serum

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This heat-activated serum delivers up to 5 washes of frizz control and high shine when used with Sleek & Shine Shampoo and Conditioner.
size

$9.99 MSRP

Where to buy

Product Information

Part of the Fructis Sleek & Shine system, the heat-activated Garnier Sleek & Stay serum delivers up to 5 washes of frizz control and high shine*! It provides heat protection up to 450°F and is infused with alpha-silanes for long-lasting smoothness.

This leave-in serum is a smoothing hair treatment formulated without parabens, phthalates, or DMDM Hydantoin. Like all Garnier products, it is approved by Cruelty Free International under the Leaping Bunny Program.

*when used in the shampoo, conditioner, and Sleek & Stay system

Instructions of Use

Before use, shake Garnier Sleek & Stay well. After washing with Sleek & Shine Shampoo and Conditioner, apply this hair smoothing serum to damp hair. Distribute evenly after each pump. Do not rinse. Blow-dry hair completely, then use a flat iron to seal in sleekness and lock in style.

Ingredients

DIMETHICONE, BIS-(MORPHOLINOMETHYL C1-4 DIALKOXYSILOXY) DIMETHICONE, BIS-CETEARYL AMODIMETHICONE, PARFUM / FRAGRANCE
Before and after of female model using Sleek & Shine Sleek & Stay leave-in serum

All Shine, No Frizz

  • Heat-activated protective serum.
  • Up to 5 washes of anti-frizz power.
  • Heat protection up to 450°F.
  • Long-lasting shine and sleekness.

Sleek & Stay Serum is infused with alpha-silane for long-lasting sleek and scientifically tested to control frizz with a patented water-resistant technology.

Argan Oil + Vegan Keratin
Sleek & Shine full Collection on green background

Check out the rest of the Sleek & Shine hair care and styling collection to complete your regimen.

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Discover The Fructis Sleek & Shine Collection

Elevate your hair care with the full Sleek & Shine regimen. From conditioner to leave-in serum, every formula is infused with argan oil and vegan keratin to smooth frizz, hydrate dry hair, and boost shine from root to tip.
A Garnier Sleek & Shine shampoo bottle dispensing out product.

Sleek & Shine Smoothing Shampoo

  • Infused with nourishing ingredients: Argan oil nourishes and smooths hair while vegan keratin strengthens hair.
  • Real results: 3 days sleek when used with Sleek & Shine shampoo and anti-frizz serum.
  • Frizz control: Locks out humidity and tames flyaways for a sleek, long-lasting finish.

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Sleek & Shine Smoothing Conditioner

  • Infused with nourishing ingredients: Argan oil and vegan keratin packed with plant-based amino acids like those found in hair.
  • Lightweight smoothing conditioner: It glides on effortlessly to fight frizz, boost shine, and enhance your hair's natural beauty.
  • Frizz control: Enjoy up to 72 hours of touchably smooth, manageable hair – even in 97% humidity.

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One bottle of shampoo (right) and conditioner (left) from the Garnier Sleek & Shine collection.
A bottle of Garnier Sleek & Shine anti-frizz serum dispensing product. This serum creates a protective barrier to block humidity and keep your hair sleek and polished.

Sleek & Shine Anti-Frizz Serum

  • Infused with nourishing ingredients: Argan oil nourishes and smooths hair while vegan keratin strengthens hair.
  • Clinically proven results: Up to 72 hours of sleek, frizz-free hair even in 97% humidity.
  • Frizz control: Creates a protective barrier that blocks humidity, smoothing flyaways and leaving hair sleek and polished.

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Sleek & Shine Frizz Tamer

  • Instant Frizz & Flyaway Control: Tame unruly frizz and baby hairs on-the-go with this lightweight, transparent finishing serum for sleek, smooth, and shiny hair.
  • Hydrating & Shine-Boosting Formula: Infused with plant keratin, argan oil, and a sleek serum complex to hydrate and boost shine for up to 12 hours, without greasiness or stickiness.
  • Clean & Cruelty-Free: Enjoy a silicone-free, phthalate-free, and mineral oil-free formula. Officially approved by Cruelty Free International under the Leaping Bunny Program.

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A woman with black hair with a braided hair style and a woman with blonde hair in a pony tail with un-frizzed hair.
A bottle of Garnier 10-in-1 leave-in spray misting in the air. This product provides reduced flyaways, boosted shine, visible damage reduction and nourishment in one-non greasy formula.

Sleek & Shine 10-in-1 Leave-In Spray

  • 10-in-1 Hair Transformation: This powerful leave-in treatment, infused with argan oil and plant keratin, smooths, protects (up to 450°F heat), and repairs frizzy, dry hair for up to 72 hours.
  • Comprehensive Care & Styling: Enjoy reduced flyaways, boosted shine, visible damage reduction, and nourishment in one non-greasy, non-weigh-down formula, simplifying your routine.
  • Clean & Cruelty-Free: Formulated without parabens, silicones, phthalates, or DMDM hydantoin. All Garnier products are officially approved by Cruelty Free International under the Leaping Bunny Program.

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Hair Care Routine Quiz

Hair Care Routine Quiz

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FREQUENTLY ASKED QUESTIONS

  • Garnier Sleek & Stay serum is formulated for use on damp hair as part of the Garnier Sleek & Shine system, along with Sleek & Shine shampoo and conditioner. Since it is heat-activated, you'll achieve best results using a blow dryer and a flat iron. However, it can be used on dry hair.
  • Sleek & Shine is recommended for hair that needs frizz control and shine. This is usually chronically dry hair or hair going through a dry spell due to environmental factors, age, or seasonal changes.
  • Yes! Garnier Sleek & Stay smoothing treatment provides heat protection up to 450°F. Plus, its activated by heat so you can use your hair dryer and hot tools without causing damage, and the results will be lasting shine and no frizz.
  • The amount of Sleek & Shine smoothing hair serum you use depends on how much hair you have. Apply one pump at a time and evenly distribute with a wide-toothed comb between each pump until your hair is well saturated.

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