00 Clear

00 Clear is the pure, transparent build with a soft, milky-white sheen — strength and shape without colour. It lets your natural nails shine through and gives a glossy, well-groomed look that goes with everything.

It's the invisible strength. And the perfect canvas if you want to build colour on top.

See all our Builder Gel shades.

About our Builder Gel

Builder Gel is a building gel that cures under UV/LED light and gives your nails extra strength, structure and shape. It can be used to reinforce your natural nails or to build the length and shape you dream of. Wear it alone for a natural, well-groomed look in the beautiful Builder Gel shades, or as a strong foundation beneath a Gel Polish colour.

Our innovative 21FREE+ Builder Gel formula from The Gel Collection is developed to create a strong, stable build that supports and protects your nails in everyday life. That makes it especially well suited to nails that break easily, or to you who want a more substantial reinforcement, a more beautiful shape or extra length.

The full, creamy consistency stays where you place it without running into the cuticle. At the same time, the gel levels out beautifully across the nail and helps smooth small irregularities as you work. That gives you more calm, control and time to build the shape you want before curing.

Once cured, Builder Gel forms a strong, stable structure that helps distribute everyday pressure and strain across the nail. You get a solid reinforcement that can both protect the natural nail and support an extension.

It's the beautiful colour and shape you notice first. But it's the feeling of strong, solid nails that makes you come back.

The nerdy explanation

Your nails are exposed to pressure, knocks and small strains every day. If the build is too soft, it doesn't provide enough support, and the strain can concentrate on the most vulnerable areas of the nail. Builder Gel 21FREE+ cures into a strong, stable structure that helps distribute the load across the entire nail. In short: solid support and reinforcement — whether you're strengthening your natural nail or building an extension.

Why you'll love it

• Ultimate reinforcement and extension in one.
• Full, creamy consistency that stays where you place it.
• Self-levelling formula that helps smooth out small irregularities.
• Gives you calm and control while you build the shape you want.
• Creates a smooth, even surface — with or without Gel Polish on top.
• A large colour universe with shades, finishes and effects for every look.
• Developed without HEMA and TPO as part of the 21FREE+ universe.

See the ingredient list for all products in The Gel Collection.

30 ml

Get the most out of your nail products by taking the time to watch our video guides. There you will find step-by-step guides and everything you need to know about theory and techniques. When you follow the guidance, you protect your nails and secure long wear at the same time.

How to strengthen or extend with Builder Gel – step by step

Builder Gel can both strengthen your natural nail and build length – the routine is the same.

1. Prep – file length and shape, push back the cuticles, buff the surface lightly, clean with cleaner and apply primer (air-dries in 60 sec.). Watch the prep video guide →
2. Base coat – a very thin layer, seal the free edge, and cure the whole hand in the lamp.
3. Reinforce – or extend – with Builder Gel – prime the brush in the gel first. Brush a very thin slip layer over the whole nail (without curing). Place a small bead in the centre of the nail, push it towards the cuticle and out to the sides, and pull the rest evenly towards the tip – seal the free edge. Turn the nail upside down so the gel forms a natural apex. Flash-cure 10 sec. per nail, and fully cure the whole hand at the end. Want length? Build the extension on forms or tips first, then build the shape the same way. Extension on forms → on tips →This product is used in step 3
4. File the shape (if desired) – remove the sticky layer with a wipe and cleaner, file the nail, and wipe it free of dust.
5. Gel Polish colour (optional) – two thin coats on top of the reinforcement, cure between coats.
6. Top coat – seal the free edge, and cure.
7. Nail oil – wash your hands and finish with oil at the cuticles and under the nail.

Missing the basics? Start here

Builder Gel goes on top of the basics: lamp, base, top and prep. It is all in the Gel Polish Starter Kit – and the Builder Gel part comes as an add-on package, depending on whether you want to reinforce or extend.

Gel Polish 21FREE Starter Kit Packs and kits

€61⁹⁵ €89⁰⁰

For reinforcing your nails

Builder Gel Reinforcement Add-on Package Builder Gel

€18⁸⁷ €26⁹⁵

For extending your nails

Builder Gel Extension Add-on Package Builder Gel

€47⁵⁷ €67⁹⁵

Watch the video guide: Reinforcement with builder gel

Want the whole theory?

The Gel Guide takes you through everything – technique, products and step by step.

The Gel Guide Guides

€3⁸⁵ €5⁵⁰

21FREE+ is our own formula, developed to give you salon results at home – without 21 selected, often debated ingredients – and, of course, also without HEMA and TPO. Better for you, without compromising on wear.

• Free from 21 selected ingredients – and also without HEMA and TPO
• Salon quality – long wear and precise application
• 100% vegan – never tested on animals
• Safety first – every formula is safety-assessed under the EU Cosmetics Regulation

21FREE+ is the next generation of our 21FREE line: creamy texture, stronger pigmentation, a more precise brush and a new bottle – still completely free from the same 21 ingredients.

See all 21 ingredients we have left out →