Sevich Hair Building Fibers bottle in Black shade with color swatch

Sevich Hair Building Fibers — Instant Thickness in 30 Seconds

Black 25g
$44.00
$44.00
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Sevich Hair Building Fibers bottle in Black shade with color swatch
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  • Sevich Hair Building Fibers bottle in Black shade with color swatch
  • Man holding a small dark applicator jar near his hairline, buzzed fade haircut, bathroom setting
  • Woman with wet hair after a workout, sweat visible on forehead, close-up
  • Smiling man running his hand through a full head of hair
  • Sevich Hair Building Fibers bottle and packaging with before-and-after photo of a man's thinning hairline fully covered
  • Applying hair fiber powder to a beard with a small brush, then blending in
  • Man applying hair building fiber powder to his thinning hairline
  • Man shaking hair fiber powder onto his scalp
  • Man applying hair fiber powder from a bottle onto his thinning crown
  • Sevich Hair Building Fibers bottle and box with full color chart showing all 10 available shades
  • Illustration of hair fibers bonding to thinning strands, with before-and-after photos of fiber application and text 'Full of hair in 30 seconds'
  • Smiling woman running her fingers through healthy-looking hair
  • Man holding a small tin near his hairline, close crop haircut, warm indoor lighting
  • Man running his hand through his hairline, close crop haircut, natural window light
  • Man with wet hair after a workout, sweat visible on forehead, close-up
  • Woman with short wet hair after a workout, sweat visible, close-up
  • Woman with gray wet hair after a workout, sweat visible, close-up, smiling
Sevich Hair Building Fibers — Instant Thickness in 30 Seconds

Sevich Hair Building Fibers — Instant Thickness in 30 Seconds

$44.00
$44.00

That split-second in the mirror when the light hits your part wrong — Sevich Hair Building Fibers cover it in under 30 seconds. Natural keratin fibers bond to your own hair for instant, undetectable coverage, for men and women.

No harsh chemicals. No heavy residue. Just natural-looking volume that lasts all day — sweat runs right through it, it doesn't run with the sweat. A hard workout, a long shift, a hot day outside: none of it washes the fibers away or leaves you with streaks to worry about.

How to use
Shake onto dry hair over thinning areas → blend with fingertips → finish with Bunee FiberHold Spray to lock in place through sweat, sports, and touch. Done in under 30 seconds.

Not just for scalp hair
The same keratin fibers cling to any existing hair via static — patchy beards and thin eyebrows can use the same 30-second fix.

Why it works

  • Natural keratin fiber formula
  • Sweat and wind resistant, especially paired with FiberHold Spray
  • Undetectable to touch and sight
  • Works for all hair types — men and women
  • Works on scalp, beard, and eyebrows
  • Available in 10 shades to match your natural color

Sizes: 12g (White only) · 25g (all shades) — plus a separate fiber applicator sold on its own.

Instant Coverage

Keratin fibers bond to your hair in seconds, for a natural, undetectable finish — no waiting, no commitment.

Made for Everyone

One formula, 10 shades, for men and women of every hair type.

All-Day Confidence

Wind, rain, or sweat — pair with our Lock-In Spray and it stays put all day.

Applying hair fiber powder to a beard with a small brush, then blending in

Blends Like Real Hair

Natural keratin protein clings to your existing strands via static — not a powder sitting on top, so it looks and feels like your own hair.

Built to Survive Your Day

Shake on the fibers, then lock them in with Bunee FiberHold Spray. It coats each individual fiber and forms a flexible, tough seal — so it holds through heavy sweat, sprints, and full-contact sports, even after someone runs a hand through your hair.

Woman spraying Bunee FiberHold Spray over styled hair

We built this line around one idea: you shouldn't have to wait months to feel confident about your hair. Instant coverage today, with a lock-in step that survives sweat, sports, and touch.