When you open a bottle of gel colour, there’s already a brush inside.

So why would you need another one?

Because sometimes the brush supplied in the bottle simply isn’t the best shape for the nail in front of you.

A separate gel brush gives you greater control over where the colour goes, how much product you’re applying and how precisely you can work around the cuticle and sidewalls.

The Katie Barnes 05, 06 and 07 Brushes have different shapes so you can choose your brush according to the nail and the way you prefer to apply your gel.

Because one brush shape isn’t necessarily perfect for every nail.

Why use a separate brush for gel colour?

A bottle brush needs to be suitable for a wide range of users and applications.

But your clients don’t all have the same nails.

• Some have tiny nail plates.
• Some have wide nails.
• Some have very curved cuticle areas.
• Some have straighter cuticle shapes.

And some have deep sidewalls that are difficult to reach cleanly with a larger bottle brush.

Using a separate professional gel brush allows you to adapt your application to the nail rather than trying to make one bottle brush work for everybody.

1. You have greater control over your product

Product control is everything when applying coloured gel.

Too much product can cause flooding, unevenness and curing problems.

Too little can create patchiness and encourage you to repeatedly work over the same area.

Using a separate brush allows you to control how much gel you’re loading into the bristles before taking it to the nail.

Rather than working with whatever amount comes out of the bottle, you control the product from the beginning.

2. You can get closer to the cuticle

A clean application close to the cuticle can make a freshly completed manicure look incredibly polished.

But close doesn’t mean touching.

Uncured gel should never be deliberately applied onto the client’s skin.

A separate precision brush can give you greater control around the perimeter of the nail, allowing you to create a small, consistent gap without flooding the surrounding skin.

This can be particularly helpful when the bottle brush is simply too large for a client’s nail.

3. It’s easier to reach the sidewalls

Sidewalls are another area where brush shape makes a big difference.

A brush that’s too wide can make it difficult to access narrow areas without touching the skin.

A more suitable shape allows you to guide colour precisely where it needs to go.

Rather than twisting your wrist or forcing the brush into an awkward position, choose a brush that works with the nail.

4. You can create a more consistent application

A good colour application isn’t just about getting close to the cuticle.

You also want your gel to be applied at a consistent thickness.

A separate brush allows you to spread and manipulate the colour in controlled movements, helping reduce heavy areas, brush marks and uneven product distribution.

This is particularly useful with highly pigmented colours where uneven application can be more noticeable.

Which Katie Barnes gel brush should you choose?

This is where the 05, 06 and 07 Brushes come in.

They’re different shapes for a reason.

Rather than asking which one is simply “the best”, think about the nail shape, product and movement you want from your brush.

Katie Barnes 05 Brush

The Katie Barnes 05 Brush has a more traditional flat, straight-edged shape.

This gives you a clean working edge and excellent control over product placement.

It’s particularly useful when you want to manually control the perimeter of your application and create crisp, deliberate movements.

The straighter shape works brilliantly for:

• Controlled gel colour application
• Straight or squarer cuticle shapes
• Sidewall application
• Precise product placement
• Smoothing colour across the nail
• Nail techs who prefer a traditional flat gel brush

Because the edge is more defined, you control the shape rather than relying on the brush to naturally follow a curved cuticle.

Katie Barnes 06 Brush

The Katie Barnes 06 Brush has a rounded/oval shape.

That curved edge can make following the natural shape of the cuticle area much easier.

Rather than trying to create a curved perimeter using a completely straight brush, the shape of the 06 helps you work with the natural curve of the nail.

It’s ideal for:

• Rounded cuticle areas
• Getting neatly around the cuticle perimeter
• Smooth gel colour application
• Smaller controlled movements
• Following the natural shape of the nail
• Creating a soft, even application

If you regularly struggle to create a beautifully curved cuticle application using your bottle brush, try switching to a rounded gel brush.

Sometimes the shape of your tool is making the technique harder than it needs to be.

Katie Barnes 07 Brush

The Katie Barnes 07 Brush offers another shape and working profile for gel application, giving you a different balance of precision and coverage.

Its shape makes it useful when you want to adapt the brush to different areas of the nail -  using the broader working area for colour application while still having the control needed to refine smaller sections.

It’s brilliant for:

• Controlled colour application
• Working across different nail shapes
• Refining the perimeter
• Sidewall application
• Smoothing gel
• Nail techs who want versatility from their colour brush

The different profile of the 07 gives you another option when neither a completely straight nor traditionally rounded brush feels natural for your application technique.

05 vs 06 vs 07: Which Gel Brush Do You Need?

Think of your three brushes as different tools rather than three versions of the same thing.

05 – Flat/Straight
Best for controlled, precise application and technicians who prefer a traditional straight working edge.

06 – Rounded/Oval
Best for following curved cuticle areas and creating a soft, clean perimeter.

07 – Versatile Shaped Gel Brush
Best for adapting between broader colour application and more precise areas around the nail.

You may have a favourite.

Or you may find yourself changing brushes depending on the client’s nail.

That’s the benefit of having different shapes available.

How to apply coloured gel with a separate brush

Start by dispensing a small amount of your gel colour onto an appropriate palette.

Choose your 05, 06 or 07 Brush based on the nail and your preferred technique.

Load a controlled amount of colour into the bristles.

You don’t need to completely saturate the brush.

Place the product onto the nail and use smooth movements to distribute the gel.

As you approach the cuticle area, reduce your pressure and use the shape of your brush to create the perimeter.

Turn the client’s finger to access each sidewall rather than twisting your wrist.

Then check the nail from different angles before curing.

Don’t overload your brush

More gel doesn’t create better coverage.

If you’re using too much product, you may experience:

• Flooding.
• Bulky application.
• Uneven curing.
• Wrinkling.
• Product moving before it reaches the lamp.

Instead, apply controlled layers according to the gel manufacturer’s instructions.

If a colour isn’t sufficiently opaque after one coat, don’t compensate by applying one extremely thick layer.

Build your coverage correctly.

Use the shape of the brush

Don’t choose a specialist brush and then ignore the feature that makes it useful.

If you’re using the rounded 06, allow that curve to follow the cuticle perimeter.

If you’re using the straighter 05, use the defined working edge to control your product placement.

Learn how the 07 behaves at different angles and use its shape to access different areas.

Changing the angle of the same brush can also completely change how much of the bristle surface contacts the nail.

Don’t press too hard

Pressing a brush heavily against the nail spreads the bristles.

This reduces your precision and can push product into areas where you don’t want it.

Around the cuticle and sidewalls especially, keep your pressure light.

Allow the shape of your Katie Barnes brush to do the precision work.

Why does my coloured gel keep flooding?

If your gel continually runs into the cuticle area, a different brush can help but also look at your technique.

Check:

Product amount: Are you applying too much?

Product consistency: Is your gel particularly fluid?

Hand position: Is the client’s finger tilted towards the cuticle or one side?

Speed: Are you spending so long perfecting one area that the product floods somewhere else?

Pressure: Are you pushing the gel towards the skin?

A precision brush gives you greater control, but you still need to understand how your product behaves.

Why does my gel look patchy?

Don’t automatically add a huge amount of product.

Patchiness can come from uneven pressure, insufficient pigmentation, overworking the gel or inconsistent product distribution.

Use your separate gel brush to create smooth, controlled strokes and maintain a consistent layer.

If the product requires another coat, cure correctly and build the colour in appropriate layers.

Why can’t I get close to the cuticle?

Your bottle brush might simply be too large or the wrong shape for the client’s nail.

This is exactly where switching to the Katie Barnes 05, 06 or 07 can make a difference.

Choose the brush shape that best matches the area you’re trying to access and use a small amount of product.

And remember:

Getting close to the cuticle isn’t a competition.

A tiny, consistent gap with no skin contact is better than an application that’s technically closer but repeatedly floods the skin.

Do You Really Need a Separate Gel Brush?

You don’t have to apply coloured gel with a separate brush.

But if you’re struggling with your bottle brush, there’s no reason to let it dictate your application.

Professional nail technicians use different tools because different jobs require different levels of control.

A separate colour brush can help you achieve:

More precise product placement.
Cleaner cuticle application.
Better sidewall access.
Greater control over product quantity.
More consistent coverage.
An application suited to the client’s individual nail shape.

The Katie Barnes 05, 06 and 07 Brushes give you three different shapes so you can choose the tool that works with your technique rather than against it.

Sometimes improving your gel application isn’t about changing your gel.

It’s about changing the brush you’re applying it with.