KÉRASTASE Blond Absolu Blonde Guard Leave-In Milk — 6.4 oz Hydrating, Heat & UV Protection for Blonde Hair

Designed for all shades of blonde — from natural to color-treated and highlighted hair — this leave-in treatment combines targeted hydration with active brightening agents. It absorbs quickly without weighing hair down, seals in moisture, and forms a protective barrier against environmental aggressors so blond tones stay luminous between salon visits.

How does Blonde Guard protect hair from heat and the elements?

The formula creates a protective shield that helps resist common blonde stressors such as thermal tools, sunlight, chlorine, and salt water. Ingredients work together to reduce the visible impact of those aggressors while preserving softness and manageability.

• Shields hair from heat up to 450°F for safer styling.
• Guards against UV-related fading and environmental oxidation.
• Helps neutralize damage from pool and ocean exposure.
• Leaves a lightweight protective film without residue.

Will this leave-in actually hydrate and detangle without heaviness?

Yes—dual-weight hyaluronic acid provides immediate surface slip and deeper moisture delivery so strands feel plump but not greasy. The milk texture smooths the hair cuticle, reducing friction for easier combing and faster styling.

• Dual-weight hyaluronic acid hydrates both surface and internal fiber.
• Light, non-oily milk detangles mid-lengths to ends efficiently.
• Improves softness and silkiness for days after a single use.
• Absorbs quickly, allowing blow-drying or air-drying without weighing hair down.

How does it help maintain salon-fresh brightness?

Brightening Hydration technology combines antioxidant vitamins with micronized hydrators to protect color molecules and reflect more light. Regular use helps sustain the appearance of fresh highlights and overall blonde luminosity between color appointments.

• Vitamins C and E act as antioxidative allies to preserve tone.
• Micronized hydration supports even color reflection and shine.
• Clinically tested performance for prolonged brightness and softness.
• Compatible with the Blond Absolu range for enhanced results.

How should I use this leave-in for best results?

Apply on towel-dried hair, focusing from mid-lengths to ends, and do not rinse. You can then blow-dry or let hair air-dry; styling tools may be used as usual thanks to the heat protection properties.

• Saturate hair evenly on damp strands, avoiding the roots for lightness.
• Do not rinse out — leave the product to work as a shield and hydrator.
• Pair with Blond Absolu Bain Lumière and Cicaflash for a full brightening routine.
• Reapply before heat styling or sun exposure for extra protection.

Who is this for: KÉRASTASE Blond Absolu Blonde Guard Leave-In is formulated for anyone with blonde hair seeking lightweight hydration, easier detangling, and daily protection from heat and environmental fading. It suits natural, highlighted, balayage, or fully lightened hair and is ideal for people who use hot tools, spend time outdoors, or want to extend salon-fresh brightness between 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