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

Kérastase Blond Absolu Blonde Guard Leave-In is a lightweight, leave-on hydrating milk that protects blonde hair from heat, UV, salt, and chlorine while detangling and boosting shine.

This leave-in treatment is formulated specifically for blonde tones — whether natural, highlighted, or color-treated — to reinforce moisture, reduce breakage, and preserve brightness between salon visits. It combines dual-weight hyaluronic acid with vitamins C and E to deliver multilayer hydration and antioxidative support, all in a non-greasy sprayable milk designed to be left in and styled as usual.

How does this product protect my blonde from everyday damage?

The Blonde Guard Leave-In creates a protective barrier that shields hair fibers from common aggressors like high-heat styling, UV exposure, chlorinated pools, and salt water. The formula is engineered to reduce the impact of these stressors so color and tone remain vibrant and strands stay smoother.

• Guards against heat up to 450°F for safer blow-drying and straightening.
• Filters and protects from UV rays to minimize fading and brassiness.
• Shields from chlorine and salt to prevent dryness and dulling after swimming.
• Blocks a broad range of blonde-specific aggressors for daily protection.

What hydration benefits will I notice and how long do they last?

Formulated with dual-weight hyaluronic acid, the leave-in delivers quick surface moisture and deeper, micronized hydration to plump and soften strands. Users experience immediate detangling and manageability, with sustained hydration that can last up to three days on the hair surface depending on styling and environment.

• Instant smoothing and easier comb-through on towel-dried hair.
• Deep hydration to reduce roughness and improve hair elasticity.
• Visible softness and fuller strand appearance after application.
• Hydration persistence for day-to-day styling without residue.

Will this product help keep my salon color looking fresh?

The formula contains antioxidant vitamins and brightening hydration technology that help preserve color vibrancy and brightness. In clinical testing, paired use with the Blond Absolu range maintained salon-fresh appearance and tactile softness over time, reducing the frequency of corrective toning needed.

• Vitamins C and E provide antioxidative support to protect pigments.
• Brightening hydration helps sustain luminous blonde tones.
• Designed to be used alongside Kérastase Blond Absolu products for best results.
• Clinically shown benefits for maintaining brightness and softness.

How should I use the Blonde Guard Leave-In for optimal results?

Apply to towel-dried hair from mid-lengths to ends and leave in — there’s no rinsing required. You can then either air-dry or style with heat; the product will help detangle and protect during heat application. For a coordinated routine, follow with Blond Absolu Bain Lumière shampoo and Cicaflash conditioner.

• Spray evenly on towel-dried hair, concentrating on mid-lengths and ends.
• Do not rinse; proceed to air-dry or heat-style as usual.
• Use regularly after washing to maintain protection and hydration.
• Combine with other Blond Absolu products for enhanced color care.

Who is this for: Kérastase Blond Absolu Blonde Guard Leave-In is ideal for anyone with blonde hair—natural, highlighted, balayage, or salon-colored—seeking a lightweight, effective leave-on treatment to detangle, hydrate, and protect against heat, UV, and water-related damage while preserving brightness and softness between professional color appointments.

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