2327 verified buyers

Instant Hair Building Fibres

Lasts up to 48H
Instant results
Natural ingredients
15 grams

Struggling to choose your shade? click here

Free applicator for the next 12 orders!

Jack Thompson

Thought it wouldn’t work on my thinning crown, but it blended in perfectly. Looks fuller in seconds.

Oliver Martin

I’ve got sensitive skin and this didn’t irritate at all. Super natural feel.

William Wilson

Didn’t expect it to hold through sweat and heat, but it really does. Lasted all day at work!

What is Kalvass ?

An instant hair concealer powder made from natural cotton microfibres designed to cover thinning areas and bald spots in just 10 seconds, without surgery or heavy treatments.

If it’s water-resistant, how do I remove it ?

Just wash with your usual shampoo to remove the powder.

What if I have fully bald spots ?

Even in areas that appear bald, there are often fine or light hairs still present.
The fibres are designed to cling to those strands, filling in gaps and creating a natural-looking density.
That’s how Kalvass delivers an even finish even with significant hair thinning.

Is it safe for my scalp ?

99% natural. No harsh chemicals. Safe for sensitive scalps.

Does it really last all day ?

All-day hold, even with sweat or humidity. One 15g jar lasts around 30 to 35 uses.

How does it work exactly ?

Electrostatic adhesion: the cotton microfibres are positively charged.

Hair bonding: they cling to the cuticles of each strand, even the finest and nearly invisible ones, instantly creating a fuller, denser look.

Long-lasting hold: this natural grip keeps the fibres in place, even in the shower, at the gym, or in the wind.

How to apply it ?

Apply a small amount to dry hair, focusing on areas you want to conceal. Blend with the applicator or your fingers, then use a light fixing spray if needed. Visible results in just 10 seconds.

Shipping & Returns

Fast shipping (6 to 8 business days) – Free on orders over 39,99 £!

30-day returns if you're not satisfied.

(+2000 verified reviews)

Some feedback from our customers

Liam

I genuinely got back the hair density I was looking for. My wife is absolutely thrilled, and I’ve completely regained my confidence. The application is easy and super convenient.

Harry

Honestly, I didn’t think a product like this would actually work. But it’s super easy to apply, and it stays in place all day without any issues!

Oliver

I’ve got thinning hair at the back, blends in perfectly and gives me way more confidence.

Oliver

Honestly thought it would be noticeable. But nah can’t see a thing, even up close.

Nathan

Great that it comes with a mirror. I can fix up before work or after the gym.

Mason

Wasn’t sure if it would stick on my scalp, but it grabs even the tiny hairs. Works great.

Finley

Used it for a wedding last weekend, stayed perfect through heat and photos.

Impressive results !

Instant confidence boost

Nº1 For good reason

Other
100% clean and natural
Undetectable result, impressive effect
Waterproof, friction-resistant
Easy 10-second application
Built-in mirror, ready for any situation

Dermatologically tested