K18 AstroLift Reparative Volume Spray for Fine, Fragile Hair — 4 fl oz, 2-Day Humidity-Resistant Hold

This spray pairs K18PEPTIDE™ repair technology with a targeted hair-fiber volumizing blend to thicken strands and restore springy movement from root to tip. Designed for fragile, fine, or limp hair, the formula focuses on reversing the structural weakening that makes hair fall flat. It’s non-sticky, non-crunchy, and formulated to stay buoyant through humidity, so volume looks natural and lasts.

How does this spray repair the damage that reduces volume?

K18 AstroLift™ delivers K18PEPTIDE™, a patented peptide that works to reconnect and reinforce the hair’s internal structure, helping strands regain elasticity and resilience. Rather than coating hair with heavy polymers, the spray targets the root causes of collapse so volume has a stronger foundation.

• Contains K18PEPTIDE™ to help restore hair’s internal strength.
• Rebuilds hair integrity rather than just masking weakness.
• Supports longer-lasting lift by improving strand bounce.

Will this give my hair noticeable thickness and how long does it last?

The hair-fiber volumizing blend in AstroLift™ creates perceptible thickness from roots through ends, delivering fuller-looking hair without weight. Results are buildable and designed to maintain touchable volume for up to two days under typical conditions.

• Creates 2.5x more all-over volume compared to untreated hair.*
• Buildable formula lets you layer product for extra lift without stiffness.
• Formulated to preserve volume up to 48 hours with natural movement.

Is the hold natural or will my hair feel sticky or crunchy?

AstroLift™ is formulated for natural-feeling hold: it avoids sticky resins and crunchy polymers, leaving hair soft to the touch while keeping style intact. The humidity-resistant finish helps maintain lift and bounce without a stiff or coated sensation.

• Non-sticky, non-crunchy formula for flexible hold.
• Humidity-resistant ingredients protect style in damp conditions.
• Delivers touchable texture—style moves with the hair.

How should I use it for best results on fine, fragile hair?

Apply to clean, damp or dry hair focusing at the roots and mid-lengths, then style as usual—blow-dry or air-dry. For added lift, use a round brush while blow-drying or apply a light second layer to targeted sections; the buildable formula lets you add volume without accumulating weight or residue.

• Spray at roots and areas needing lift, then distribute through lengths.
• Layer gently for more volume—no crunchy buildup.
• Works on damp or dry hair and complements hot tools and styling.

Who is this for: K18 AstroLift™ Reparative Volume Spray is ideal for people with thin, fine, or fragile hair who want visibly fuller hair and lasting, touchable lift without sticky or stiff residue. It’s also a strong option for anyone whose volume has been diminished by chemical or mechanical damage and who prefers lightweight, buildable styling products.

*See k18hair.com/disclaimers for testing details and context on volume claims.