Italian Keratin Granules: What They Are and How to Use Them for Perfect Extension Bonds

Italian keratin granules are small pellets of high-grade keratin protein that professionals melt to form the bond in keratin hair extensions. They are the industry standard for three reasons: they melt smoothly and evenly, they set into a strong yet flexible bond that lasts months of daily wear, and they come in colours that disappear against the client's hair. If you create pre-bonded strands from bulk hair, re-tip worn extensions, or repair loose bonds, Italian keratin granules are the material built for the job. Here is exactly how to choose them and use them.

In this article

• What are Italian keratin granules?
• Why do professionals prefer Italian keratin?
• Which keratin colour should you choose?
• How to re-tip extensions with keratin granules
• Common mistakes to avoid
• FAQ

What are Italian keratin granules?

Keratin is the same protein your natural hair is made of. Italian keratin granules are refined pellets of that protein, produced to melt at a controlled temperature and re-harden into a firm, slightly flexible bond. Because the bond chemically resembles hair itself, it moves with the strand instead of against it, which is why keratin bonds feel more natural than glue or tape attachments.

The "Italian" label matters. Italian-made keratin is considered the benchmark grade in professional extension work: it melts clean without bubbling, holds its shape when shaped with pliers or a mould, and resists crumbling as the bond ages. Lower-grade keratin often turns brittle after a few weeks of washing and heat styling.

Why do professionals prefer Italian keratin?

Three properties separate Italian keratin from cheaper alternatives:

• Smooth, even melting. The granules liquefy uniformly in a keratin pot, so every bond has the same consistency. That means predictable application times and no weak spots.
• Strong but flexible hold. A properly formed keratin bond lasts 3 to 6 months of daily wear before maintenance, in line with what stylists report for professional fusion extensions (Marie Claire's K-tip guide cites 3 to 4 months as typical).
• Discreet finish. Colour-matched granules form bonds that vanish against the root area, even on fine hair.

Which keratin colour should you choose?

Match the keratin to the hair at the attachment point, not the mid-lengths. When in doubt, go clear.

Granule colour	Best for	When to choose it
Clear	All colours	Mixed sets, highlighted hair, or when you want one jar for every client
Blonde	Colours 14 to 60	Blonde and dark-blonde installations where a transparent bond can catch light
Middle Brown	Colours 4 to 10	Brunette work where the bond should blend into the root shadow
Dark	Colours 1B to 4	The darkest bases, where a lighter bond would show through

How do you re-tip hair extensions with keratin granules?

What you will need: keratin granules, a keratin melting pot, a heat connector or fusion iron, bond moulds or pliers, and quality hair. Re-tipping only pays off with hair worth reusing: single-donor, cuticle-aligned strands survive multiple bond cycles, while mixed-donor hair rarely does.

Step 1: Remove the old bond. Break down the worn keratin with removal solution and pliers, then comb the strand clean.

Step 2: Melt the granules. Add a small quantity to your keratin pot and let it liquefy fully at the pot's recommended setting. Never rush it on high heat.

Step 3: Dip and dose. Take a strand of hair and dip the root end so it picks up a bead of keratin roughly the size of a grain of rice. More is not stronger; oversized bonds are visible and stress the natural hair.

Step 4: Shape the bond. Roll or press the warm keratin into a flat or round tip with your mould or fingers (guard your skin), keeping the shape consistent across the set.

Step 5: Let it cure. Give bonds a few minutes to harden completely before boxing or installing.

Step 6: Quality-check. A good bond is smooth, uniform and free of bubbles. Crumbly or cloudy bonds mean the keratin overheated.

What are the most common keratin bond mistakes?

• Overheating the keratin. Scorched keratin loses flexibility and the bond snaps within weeks. Melt low and slow.
• Oversized bonds. A bigger bead does not hold better. It adds weight, shows through fine hair, and strains the root.
• Re-tipping poor hair. New bonds cannot rescue stripped or mixed-donor hair. If the strand tangles before re-tipping, it will tangle after. Start from quality bulk hair.
• Wrong method for the client. Keratin bonds suit long-term wear. If your client wants flexibility, compare the options in our keratin vs tape-in vs clip-in guide.

Frequently asked questions

Is Italian keratin better than keratin glue sticks?

For strand-by-strand work, yes. Granules let you dose each bond precisely and melt more evenly than sticks, which produces cleaner, longer-lasting bonds.

How much keratin do I need per bond?

A bead about the size of a grain of rice per strand. A 50g jar covers a full head of re-tipping with room to spare.

How long do keratin bonds last?

With correct application and aftercare, 3 to 6 months before the set needs repositioning or re-tipping.

Can I reuse hair after removing keratin bonds?

Yes, if the hair itself is high quality. Single-donor, cuticle-aligned hair can be re-tipped and reinstalled across multiple cycles.

Which keratin colour is safest if I am unsure?

Clear. It works on every base colour and never shows through.