Base coat

Base coat lays the foundation for an even and long-lasting manicure. It is applied before the colored polish to improve adhesion and can help reduce the risk of discoloration from pigments. Choose a base coat that suits your nail polish and the finish you want to create, whether you prefer a natural look or bold nails.

What does a base coat do?

Base coat, also called an undercoat or base coat, forms a thin layer between the nail and the colored polish. It helps the color adhere and provides a more even surface to paint on. Depending on the formula, the base coat can also fill in minor unevenness or provide a slight tint that evens out the appearance of the nail.

A good base makes it easier to distribute the colored polish in thin layers. It can be especially useful with dark, highly pigmented, or light shades, where unevenness otherwise shows easily. Base coat can also help the manicure last better, but the result is also affected by how you prepare the nails and apply the rest of the polish.

Choose a base coat based on the nail surface and desired result

There are different types of base coat, and the right choice depends on what you want from your manicure. Start by checking which polish system the product is intended for. Then you can choose properties that suit the nail surface and the finish you like.

Transparent base coat for a classic manicure

A transparent base coat is suitable when you want to keep the shade of the colored polish without adding a tinted base. It is a simple choice for those who mainly want to improve adhesion and create a thin layer between the nail and the color. Apply sparingly so that the base becomes even and does not build unnecessary height.

Smoothing base coat for ridged nails

If the nails have visible ridges, a smoothing base coat, often called a ridge filler, can provide a smoother surface. It cosmetically fills in minor unevenness and can make the colored polish look more even. It is especially useful under solid-color polishes with a glossy finish, where the nail's texture might otherwise show clearly.

Smoothing base coat does not replace the nail's natural structure and does not remove ridges permanently. The advantage is that you can even out the appearance without having to file down the nail surface to make it smooth.

Lightly tinted base coat for a natural look

A base coat with a subtle pink, beige, or milky tint can give the nails a more uniform appearance. It can work under sheer nail polishes or be used on its own if the product is intended for that. Keep in mind that a tinted base can also affect how a transparent colored polish looks on top.

Strengthening base coat for extra support

Some base coats are designed to give soft or brittle nails extra support while the product is on. The properties vary between different formulas, so read the product description and choose according to your nails' needs. A strengthening base coat is not automatically the same thing as a separate nail hardener, which may have different instructions for use.

Base coat for regular nail polish and gel nail polish

Base coat for regular nail polish air dries. It is used under the colored polish and should be allowed to dry according to the product's instructions before you continue. How quickly it dries depends, among other things, on the formula and how thick a layer you have applied.

A gel nail polish however, require curing and are instead used together with a compatible gel system and a designated UV or LED lamp. Follow the manufacturer’s instructions for both the lamp, application, and curing time. A regular air-drying base coat should not be used as a substitute for gel base unless the manufacturer explicitly states that it works.

The word gel is sometimes also used for air-drying polish that gives a full, glossy finish. Therefore, always check whether the product actually requires a lamp. It is the instructions for use that determine how the base coat should be used.

How to apply base coat

The preparation affects how evenly the polish applies and how well it adheres. Start by removing old polish and shaping the nails. The nail surface should be clean and dry, without any residue of hand cream or nail oil.

1. Apply a thin and even layer of base coat to the nail. Avoid the skin and cuticles.
2. Let the base coat dry, or cure it according to the instructions if you are using a gel base.
3. Continue with colored polish in thin layers and follow the product’s recommended drying or curing times.
4. Finish with a top coat that matches the same type of polish for the desired finish and extra protection against wear.

Try not to go over the same area too many times with the brush when the polish starts to set. This can pull the product along and create an uneven surface. A thin, even layer is usually a better base than a thick layer that needs more time to dry.

The difference between base coat and top coat

Base coat is used closest to the nail and is primarily developed to create a good foundation for the color. Top coat, also called top coat, is applied last and gives the manicure its finishing surface. It can, for example, provide high shine or a matte finish and help protect the colored polish against wear.

The products therefore serve different functions. A top coat is not automatically a suitable base coat, even if both are transparent. If you want to use the same product for both steps, you need to choose a formula that is explicitly intended as both a base coat and a top coat.

Make the base coat and color last better

If the polish lifts early, it may be due to several things. Residue of oil on the nail surface, thick layers, or polish that has ended up on the skin can worsen the result. Also check that the base coat, colored polish, and top coat work together, especially if you use gel nail polish.

Feel free to apply nail oil and hand cream after the manicure has dried properly. Use gloves when washing dishes or cleaning to reduce contact with water and cleaning products. When it is time to remove the polish, you should follow the product’s instructions and avoid pulling or picking it off the nail.

Common questions about base coat

Do you have to use base coat before nail polish?

It depends on the product. For regular colored polish, base coat is often a good addition for better adhesion and a smoother base. Some polishes are intended to be used without a separate base coat, so always follow the instructions for your particular polish.

Can base coat be used without colored polish?

Yes, many base coats can be used on their own for a subtle and well-groomed appearance. A lightly tinted or smoothing base coat can be especially suitable for this. Check whether the product needs to be finished with a top coat.

Does base coat protect against yellow nails?

Base coat can reduce the risk of discoloration from the pigments in colored polish by creating a layer between the color and the nail. The protection varies between products and is not a guarantee against discoloration.

How many layers of base coat are needed?

Usually, a thin layer is enough. Some smoothing or treatment products may have different instructions. More layers do not automatically provide better durability and can extend the drying time.

Should base coat be sticky?

It depends on the formula. Some base coats leave a slightly sticky surface for the next layer, and many gel bases have a sticky layer after curing. Follow the product instructions and do not wipe off the layer if it is meant to remain.