KÉRASTASE Blond Absolu Blonde Guard Leave-In — 1.5 fl oz Hydrating, Heat & UV Protectant for Blonde Hair

Kérastase Blond Absolu Blonde Guard Leave-In is a lightweight, leave-on milk that hydrates, detangles and shields all shades of blonde from heat, UV and environmental damage.

This salon-grade leave-in treatment is designed for natural, highlighted, bleached and color-treated blondes who want brighter, softer hair without heaviness. The formula combines dual-weight hyaluronic acid with antioxidant vitamins to both replenish moisture and defend against daily aggressors like heat styling up to 450°F, chlorine, salt water and UV exposure. It absorbs quickly, leaves no sticky residue, and works as a protective base before blow-drying or air-drying.

How does this product protect blonde hair from heat and sunlight?

The Blonde Guard Leave-In creates a protective film that helps block thermal and photochemical stressors that can dull or damage blonde hair. It's formulated to resist heat up to 450°F and shields strands from UV rays and environmental minerals that accelerate breakage and color fade.

• Heat protection rated to 450°F for styling tools
• UV filter system helps reduce sun‑related color fading
• Protects against chlorine and salt water exposure

What hydration benefits will I notice after using this leave-in?

The treatment delivers both immediate surface softening and deeper moisture retention through dual-weight hyaluronic acid. Hair feels plumper and more manageable, with visible shine and reduced roughness for up to several days after application.

• Dual-weight hyaluronic acid for instant and lasting hydration
• Leaves hair soft, supple and easier to detangle
• Clinically shown to help maintain brightness and softness over time

Can it preserve salon color and keep my blonde bright?

Yes — the formulation includes vitamins C and E along with brightening hydration technology to help guard against color dulling. Regular use as part of a blonde-specific routine supports longer-lasting brightness and a fresher, salon-like finish.

• Vitamins C & E provide antioxidative support for brighter tone
• Helps preserve salon-fresh brightness for extended periods
• Works best paired with Blond Absolu Bain Lumière and Cicaflash

How should I use it for best results?

Apply to towel-dried hair from mid-lengths to ends and do not rinse. Style as usual—either blow-dry or let hair air-dry. For stronger protection and maximum brightness, integrate into your routine with complementary Blond Absolu products.

• Spray or dispense evenly on towel-dried hair
• Concentrate on mid-lengths and ends; avoid roots if prone to oiliness
• Do not rinse out; follow with heat styling or air-dry

Who is this for: Ideal for anyone with blonde hair—natural, highlighted, or lightened—seeking lightweight daily hydration, easier detangling and proven protection against heat, sun and water-related aggressors. It suits salon-goers and at-home stylers who want to maintain brightness and softness without adding weight.

Ingredients

AQUA / WATER / EAU • COCOS NUCIFERA OIL / COCONUT OIL • AMODIMETHICONE • POLYQUATERNIUM-37 • PHENOXYETHANOL • PROPYLENE GLYCOL DICAPRYLATE/DICAPRATE • SODIUM HYDROXIDE • TOCOPHEROL • DIMETHICONE PEG-7 PHOSPHATE • PPG-1 TRIDECETH-6 • TETRAMETHYL ACETYLOCTAHYDRONAPHTHALENES • TRIDECETH-6 • BEHENTRIMONIUM CHLORIDE • SODIUM HYALURONATE • XYLOSE • ETHYLHEXYLGLYCERIN • CARVONE • CITRUS AURANTIUM PEEL OIL • LIMONENE • LINALYL ACETATE • ACRYLATES/STEARYL METHACRYLATE COPOLYMER • LINALOOL • SORBITAN OLEATE • ISOPROPYL ALCOHOL • CETRIMONIUM CHLORIDE • HYDROLYZED VEGETABLE PROTEIN PG-PROPYL SILANETRIOL • GERANIOL • ASCORBYL GLUCOSIDE • CITRIC ACID • PINENE • GERANYL ACETATE • CITRUS AURANTIUM BERGAMIA PEEL OIL • EDTA • CITRAL • TERPINEOL • CAMPHOR • ROSE KETONES • SODIUM BENZOATE • POTASSIUM SORBATE • PARFUM / FRAGRANCE