K18 AstroLift Reparative Volume Spray — 4 fl oz Lightweight, Humidity-Resistant Lift for Thin, Fragile Hair

K18 AstroLift™ Reparative Volume Spray rebuilds damaged hair structure while delivering touchable, humidity-resistant volume and hold for up to two days.

Combining K18PEPTIDE™ technology with a lightweight hair-fiber volumizing system, this 4 fl oz spray targets the collapse and limpness that comes from chemical, thermal, and mechanical damage. It layers easily into styling routines without stickiness or a crunchy finish, offering a buildable lift from roots to ends and a soft, bouncy feel that lasts through daily activity and light humidity.

How does K18 AstroLift™ rebuild and protect hair that loses volume?

The formula includes K18PEPTIDE™, a biomimetic peptide that helps restore the hair’s internal structure where breakage and bond weakening cause collapsed volume. Instead of masking thinness, it works on the fiber level to improve resilience so hair responds better to styling and holds shape longer.

• Reinforces compromised keratin bonds for improved elasticity.
• Reduces the appearance of breakage-related thinning.
• Prepares strands to accept and retain lift without stiffness.

How much lift and hold can I expect for daily styling?

K18 AstroLift™ delivers a buildable, lightweight lift that keeps hair feeling soft while holding style for up to two days under typical conditions. The non-sticky, humidity-resistant formula maintains bounce and avoids the crunchy texture of some volumizers, so touch-ups are easy and natural-looking.

• Up to two days of touchable volume and shape retention.*
• Humidity-resistant finish for frizz control and prolonged lift.
• Non-crunchy, non-tacky feel that lets hair move freely.

How should I use the spray for best results?

Spray onto towel-dried or dry hair focusing at the roots and mid-lengths, then style with fingers, a round brush, or heat tools as needed. It layers well with other K18 products and works on color-treated, chemically processed, and heat-exposed hair to create immediate lift and improved manageability.

• Apply 6–8 inches from roots for even distribution.
• Build volume with multiple light spritzes rather than one heavy coat.
• Style as usual; safe to combine with heat tools and finishing products.

Will this work on fragile or chemically treated hair?

Yes — the formulation is developed to support hair that’s fragile from color, bleaching, heat, or mechanical stress. It focuses on repairing and reinforcing strands while adding lift, so fragile hair appears fuller without adding weight or harsh polymers.

• Suitable for color-treated, highlighted, and chemically processed hair.
• Lightweight ingredients that won’t weigh down fine strands.
• Improves styling performance on weakened hair fibers.

Who is this product for: K18 AstroLift™ Reparative Volume Spray is made for anyone with thin, fine, or fragile hair who wants fuller-looking, touchable volume without stiffness. It's especially useful for people who have experienced volume loss from chemical services, heat styling, or daily wear and want a science-backed, buildable spray that repairs and lifts without a sticky finish.

*Results and duration based on controlled product testing. See k18hair.com/disclaimers for details.