KÉRASTASE Blonde Guard Leave-In Milk for Blonde Hair, 6.4 oz — Hydrates, Heat & UV Protectant

Kérastase Blond Absolu Blonde Guard Leave-In is a lightweight, hydrating leave-in milk that detangles, shields blonde hair from heat up to 450°F and UV exposure, and boosts brightness for softer, more resilient color.

This leave-in treatment is formulated specifically for blondes seeking daily protection and moisture without weight. It combines dual-weight hyaluronic acid with antioxidant vitamins to hydrate from the inside out while guarding hair against environmental aggressors like sun, chlorine and salt water. The milky spray texture absorbs quickly, making it practical for busy routines and salon-supported regimens.

How does Blonde Guard protect my color and lighten damage concerns?

The formula creates a lightweight defensive layer that reduces exposure to common blonde stressors—heat, UV, chlorine and salt—that accelerate fading and dryness. Clinical results support improved brightness retention and a softer finish over time when used as directed.

• Blocks heat styling up to 450°F to limit heat-related fading and brittleness
• Shields hair from UV rays that dull and yellow blonde tones
• Protects against chlorine and salt water to prevent pigment loss and stiffness

What hydration benefits does it provide and how long do they last?

Blonde Guard uses a dual-weight hyaluronic acid system to deliver both surface and deeper moisture. The combination instantly softens hair and helps retain plumpness for multiple days, improving manageability and shine without leaving residue.

• Micronized hyaluronic acid for rapid surface absorption
• Heavier hyaluronic fraction for lasting internal hydration up to three days
• Light, non-greasy milk texture suitable for daily use on towel-dried hair

Will this product help with detangling and styling?

Yes—applied to mid-lengths and ends, the leave-in smooths the hair fiber to reduce knots and breakage during styling. It primes hair for blow-drying or air-drying and pairs well with other Blond Absolu products for enhanced softness and manageability.

• Reduces friction for easier comb-through and less mechanical damage
• Prepares hair for thermal tools while offering heat protection
• Complements Blond Absolu Bain Lumière and Cicaflash for salon-level results

How do I use it for best results?

Spray evenly on towel-dried hair from mid-lengths to ends and do not rinse. Follow with blow-drying or let hair air-dry; repeat as part of your regular Blond Absolu routine to maintain brightness and softness.

• Apply on towel-dried hair; avoid scalp application to prevent buildup
• Do not rinse—leave in for continuous protection and hydration
• Use with other Blond Absolu products for optimal color preservation

Who is this for: This leave-in is designed for people with natural, highlighted, or color-treated blonde hair who want lightweight hydration, detangling ease and broad-spectrum protection from heat and environmental aggressors. It suits daily users and those who style frequently with heat tools, swim often, or live in sunny climates looking to preserve brightness and softness.

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