Base Coat vs. Top Coat: Base on the Nail, Top Over the Color

Base coat is the foundation under the color

Base coat has a lot of resin in it so it sticks well to the nail surface. Resin is the tacky material that holds the film to the nail. In effect, it makes a place for the color to hang on to.

This layer also acts as a wall between the nail and the pigment. Put color straight on the bare nail and that wall is missing. If you often wear dark colors, don’t skip this layer.

Top coat is the finish over the color

Top coat uses film-forming ingredients such as nitrocellulose, which raise shine and reduce wear. It adds one more layer, so everyday scratches don’t hit the color directly. It also makes an uneven surface look smooth.

But don’t expect top coat to work like a nail strengthener. Some contain protein or moisturizing ingredients. If you want to strengthen or moisturize, though, a dedicated product is the better choice (US beauty magazine Allure).

Check the name on the bottle first

You can’t really tell them apart by looks. Look for the words Base Coat and Top Coat on the bottle or box.

If you keep the two bottles side by side, line them up from left to right in the order you use them. You’ll be less likely to pick up the wrong one.

Clean your nails before base coat

Color doesn’t stick well if oil is left on the nail. After taking off any old polish, wipe the nail with a lint-free pad and remover. Then keep your fingers off the nail surface, because oil from your skin can transfer to it.

Avoid soaking your nails in water too. A nail that takes on water changes shape for a while. As it dries and goes back, the color can crack or peel more easily.

Apply all three thin and even

Thin, even layers are the one rule for base coat, color and top coat. Thick layers get sticky and dry slowly.

To keep color from flooding the cuticle, brush down from the center of the nail first, then do the two sides.

Cover the tip edge with every layer

Cover the edge of the nail tip so polish is less likely to peel there. Wipe most of the polish off the brush, then pass it lightly across the tip. Essie says to do this with every layer: base, both coats of color and top coat.

Top coat goes over the color, and the product sets the drying time

Top coat goes on top of the color. How long to let the color dry first depends on the product’s directions. OPI says to apply it once the color has dried. Polish loses a little shine when it’s fully dry, and top coat brings that shine back.

If you want a time to go by, look at Essie’s product guidance. It says one coat takes about 30 to 60 seconds to dry, about as long as it takes to paint all ten nails. So finish the last finger, then go back to the first for the next coat. That time is for that brand’s products. If your bottle says something else, follow your bottle.

It takes longer to dry than you’d think

Essie says to sit for about 15 minutes after all four layers. It may feel dry on the surface, but drying all the way through takes 2–3 hours. Temperature and humidity also make a difference.

So painting your nails right before cooking dinner or doing the dishes works against you. Finish your chores first, and start when you won’t need your hands.

On red or orange days, add one more coat

When you wear a strong red or orange, add one more coat of base coat. It’s a way to prevent nail discoloration, recommended by the American Academy of Dermatology (AAD).

Deep red stains more easily the longer you wear it. A 2012 DermNet article looks at deep reds that contain the pigments D&C Red No. 6, 7 and 34. It says wearing them 7 days in a row turns the nail plate yellow, and the color fades on its own about 14 days after removal. Don’t assume the same days for reds with other pigments.

If your nails have already turned yellow, rest that color

Nails yellowed by polish go back to their normal color over several weeks if you don’t reapply the same color. While they recover, give that color a rest. If they look the same after several weeks, show them to a dermatologist.

Some nails stain easily whatever the color or formula. Dry nails may stain more easily. Base coat is a layer that reduces staining. It doesn’t fully block it.

Use it if you want the color to last

If you’ll take the color off soon, skipping top coat is no big deal. If you plan to keep it on, it’s a different story. Repainting chipped nails means using remover more often.

The same goes for days you want shine. Top coat is the layer that brings back the shine lost as the color dries.

Some finishes don’t need top coat

Special-finish products are the exception. Essie’s TREAT LOVE & COLOR isn’t made to be used with top coat. Its matte top coat, matte about you, needs no other top coat over it. On a matte day, that bottle is your last layer.

Other products ask for their own top coat. The same brand’s gel couture uses its own top coat instead of a regular one. If you don’t know a line, read the bottle once before you start.

Bottles marked for both jobs are different

Some products are made from the start to do both jobs in one bottle. OPI’s Start to Finish, which works as base coat, top coat and strengthener, is one example.

To see if a bottle does both, check the product name and the box. If it doesn’t say so, use it only for the job in its name.

Can you mix brands?

You can, but results vary by product. Essie says it makes its base and top coats to match its own colors, and it doesn’t promise results with other brands. In other words, those products weren’t matched for how well the layers stick to each other.

That’s the maker’s view, so you don’t have to buy a matching set. But say one combination chips unusually fast, even after you’ve gone through the symptom table below. Then you could try a base and top from the same brand as your color and compare.

If it still chips fast after following the table

How long polish lasts differs from person to person. Polish chips more easily if you wash your hands often, handle detergent with bare hands or open cans with your nails. Sometimes the cause is how you use your hands each day, not how you paint.

In that case, wearing gloves for the dishes comes before adding more layers. Change one habit at a time, then compare how long your next polish lasts.

With weak nails, look at how often you remove polish

If your nails are weak and split easily, don’t remove and reapply polish more than once a week. Using remover too often can lead to more splitting and breaking (HealthLink BC, a health information service in British Columbia, Canada). If you think polish or adhesive is causing your nail problem, don’t use it.

For how to shape your nails and tidy around them, see how to trim your nails at home.

The number depends on who you ask

Essie says every other day, covering the nail tip as well. Nail artist Jin Soon Choi suggests every three days, and another manicurist says every few days (Allure). The goal is the same: to bring back the shine and make the polish last longer.

So I suggest going by your nails, not the calendar. If the shine has faded when you hold them up to the light, that’s the day to add a coat.

Adding a coat isn’t the same as repainting

Adding a coat means putting on one layer of top coat without removing anything. Repainting means taking it all off with remover and starting again. The once-a-week limit for weak, splitting nails is about removing and repainting. If you keep a deep red on for more than a week by adding coats, watch for staining too.

On days you take it all off, moisturize your nails with cream. Most removers contain ingredients that dry out nails. For how to choose a remover, see acetone vs. non-acetone nail polish remover.

Some bottles say gel but need no lamp

Some products go on and dry like regular polish but have gel in the name. Essie’s gel couture and gel setter are used without UV or LED light. So don’t sort by name alone. Check whether it tells you to cure under a lamp.

If your gel needs a lamp, the drying times in this guide don’t apply. For everything from prep to top gel, go to gel nails at home.