How to Clean Paint Brushes: Latex & Oil

You just finished a DIY paint job. The walls look fresh and the trim is crisp, but now a pile of gummy brushes and rollers is staring back at you, and tossing them feels easier than dealing with the mess.

Skip that. A decent brush is worth real money, and five minutes of cleanup keeps it soft, straight, and ready for the next coat. The right method depends on what you painted with, so below we walk through water-based, oil-based, shellac, and lacquer finishes, plus how to dry, store, and even revive a brush that has already gone hard.

Key Takeaways

Scrape first: Remove excess paint with a 5-in-1 tool or the can’s rim before the brush ever touches water or solvent.
Match the solvent to the paint: Warm soapy water for latex and acrylic, mineral spirits for oil-based, denatured alcohol for shellac, and lacquer thinner for lacquer.
Protect your plumbing: Keep paint sludge and any solvent out of the sink; wash in a series of containers and let the solids settle out instead.
Store smart: Dry brushes bristles-down or lay them flat, then slide them back into their cardboard keeper to hold the shape.

In This Article

Clean Acrylic Brushes
Clean Oil-Based Brushes
Dry Brushes
Clean Rollers
Remove Dried Paint
Cleaning Brushes in Sink
Brush Storage and Care
FAQs
Importance of Cleaning Brushes

How to Clean Acrylic Paint Brushes

Water-based paints, like acrylic and latex, are the easiest to deal with because you don’t need harsh chemicals. However, speed is key because these paints dry fast.

What You’ll Need

Warm water.
Mild dish soap.
Wire brush or paint comb.

1. Remove Excess Paint

Before you head to the water, scrape the brush against the inside rim of the paint can to save as much product as possible. You can also drag the brush across a newspaper to wipe off the outer layers of paint.

2. Rinse and Lather

Hold the brush under warm running water (or dip it into a bucket of warm water) to flush out the bulk of the paint. Add a generous squeeze of dish soap directly onto the bristles and work it in with your fingers.

3. Comb the Bristles

Paint loves to hide near the ferrule (the metal band). Use a paint comb or wire brush to gently separate the bristles and scrub away stubborn residue near the handle.

4. Rinse Until Clear

Rinse the brush again under warm water. Squeeze the bristles gently; if suds or colored water comes out, repeat the soaping process. The brush is clean only when the water runs completely clear.

Pro Tip

If your brushes feel stiff after washing, dip them in a mixture of fabric softener and warm water for a minute. It acts like a conditioner for the bristles.

How to Clean Oil-Based Paint Brushes

Oil-based paints and varnishes repel water, so soap alone won’t cut it. You need a solvent to break down the resins.

What You’ll Need

Mineral spirits, turpentine, or paint thinner.
Three clean glass jars or plastic containers.
Protective gloves.

1. Dip the Brush in Solvent

Safety First

Solvents produce strong fumes, and OSHA caps workplace exposure to Stoddard solvent, the mineral spirits often used for this job, at 500 ppm (2,900 mg per cubic meter) averaged over 8 hours. Always clean oil-based tools outdoors or in a very well-ventilated area with windows open.

Pour your chosen solvent into a clean container. Dip the brush in and work it against the sides and bottom of the container to loosen the paint. Don’t dip the brush straight into the original solvent bottle, or you will contaminate the whole supply.

2. The Multi-Jar Method

For the best results, use a three-container system to filter out the paint:

Container 1: Wash the bulk of the paint off here. The solvent will get dirty quickly.
Container 2: Move the brush to this container for a second rinse. This removes the remaining residue.
Container 3: Do a final dip here to ensure the bristles are pristine.

3. Final Wash

Once the solvent runs clear, give the brush a quick wash with warm soapy water to remove the chemical smell and residue. Reshape the bristles and let it dry.

A Note on Shellac and Lacquer

Oil paint is not the only finish that shrugs off water. Shellac and lacquer each need their own matched solvent, used with the same dip, rinse, and wash routine above.

Shellac: Rinse the brush several times in clean denatured alcohol, shaking it out between dips, then finish with warm soapy water.
Lacquer: Rinse in clean lacquer thinner, which redissolves dried lacquer quickly, then wash with soap and water.

Using the wrong solvent just smears the finish around, so read your paint can and match the thinner to the product.

Fire Safety

Rags and paper towels soaked in solvent or oil-based paint can catch fire on their own, according to a workplace safety bulletin ⁽¹⁾: as the oil oxidizes it releases heat, and a balled-up pile that cannot shed that heat can reach ignition temperature on its own, faster in warm weather. Never leave them wadded in a pile. Lay them flat to dry outdoors away from anything flammable, or seal them in a metal container until you can dispose of them.

How to Dry Paint Brushes

Gravity is your enemy when drying brushes. If you dry them with the bristles pointing up, water seeps into the metal ferrule and causes rust or loosens the glue holding the bristles.

Follow these steps for a perfect dry:

Spin it out: Roll the handle between your palms (like starting a fire) inside a bucket or box to fling out excess water. You can also buy a mechanical “brush spinner” tool for this.
Blot the bristles: Press the brush onto clean paper towels to absorb moisture.
Hang or lay flat: ideally, hang the brush with bristles pointing down. If you can’t hang it, lay it flat on a table with the bristles hanging over the edge so air can circulate.

How to Clean Paint Rollers

Rollers hold a deceptive amount of paint. If you don’t clean them thoroughly, the nap becomes matted and useless.

What You’ll Need

5-in-1 painter’s tool (putty knife).
Warm water and dish soap.
Bucket (5-gallon).

1. Reclaim the Paint

Use the curved edge of a 5-in-1 tool to scrape the paint out of the roller cover and back into the can. You can save a surprising amount of paint this way.

2. Wash the Cover

Pull the cover off the frame. Submerge it in a bucket of warm, soapy water and massage the nap to release the paint. You will likely need to change the water a few times.

3. Clean the Frame

Don’t forget the roller frame. Scrub the handle and the metal cage with a stiff brush to remove dried spatters. If the cage gets clogged with paint, the roller won’t spin smoothly next time.

How to Get Dried Paint Off Brushes

We have all been there; you forgot to wash a brush, and now it is hard as a rock. Before you trash it, try this vinegar hack to revive it.

What You’ll Need

Distilled white vinegar.
Old saucepan (not one you use for food).
Wire brush.

1. The Vinegar Soak

Pour enough vinegar into a jar to cover the bristles and let the brush soak for an hour. If the paint is acrylic, this might be enough to soften it.

2. The Boil Method

For stubborn brushes, pour the vinegar into an old saucepan and bring it to a simmer (do not boil vigorously). Place the brush in the hot vinegar for 10 to 20 minutes.

3. Scrub and Rinse

Remove the brush (careful, it will be hot) and use a wire brush to comb out the softened paint clumps. Wash with soapy water and reshape.

Can You Clean Paint Brushes in a Sink?

You can clean water-based latex paint brushes in a sink connected to a municipal sewer system once you have scraped off the excess paint, but never wash oil-based paint or solvent down any drain, and never wash any paint down a drain connected to a septic system, as the solids can settle and clog your tank.

For oil-based paints, never use the sink. Solvents and oil paint are household hazardous waste that can damage plumbing and contaminate the water supply. Save the used solvent instead: pour it into a sealed container, let the paint settle out over a few days, and reuse the clear spirits on top. Take the leftover sludge and any solvent you cannot reuse to a household hazardous waste facility, which many towns run for free.

The Eco-Friendly Bucket Method:
Instead of running water continuously, wash your tools in a series of buckets. Let the dirty water sit for a few days so the paint solids settle to the bottom. Pour off the clear water and dispose of the dried sludge in the trash.

Tips For Storing and Caring for Paint Brushes

Proper storage ensures your brush keeps its shape and “cutting” ability for precise lines.

Short-Term Storage

If you are taking a lunch break or waiting for a coat to dry, you don’t need to do a full wash. Simply wrap the wet brush head tightly in plastic wrap or place it inside a Zip-Loc bag. Squeeze out the air to seal it. This keeps the paint wet for hours or even overnight.

Long-Term Storage

When the project is done, follow these steps to protect your investment:

Clean thoroughly: Any leftover paint will harden and ruin the bristles.
Comb the bristles: Ensure they are straight and untangled.
Use the “Keeper”: Most quality brushes come in a cardboard sheath called a keeper. Put the dry brush back inside it to maintain the chisel shape. If you lost it, fold a piece of heavy paper around the bristles and tape it.

Choosing the Right Brush

Sometimes cleaning is difficult because you used the wrong tool. Here is a quick cheat sheet:

Natural Bristles (Hog Hair): Use these for oil-based paints, stains, and varnishes. Water makes them limp.
Synthetic Bristles (Nylon/Polyester): Use these for water-based latex and acrylics. They hold their shape well in water.
Sizing: Use a 1-inch to 2-inch angled sash brush for cutting in corners and trim. Use a 3-inch or 4-inch flat brush for large flat areas.

FAQs

How Do You Store Paint Brushes Between Coats?

Store a paint brush between coats by wrapping the wet bristles tightly in cling wrap, a sealable sandwich bag, or a plastic grocery bag with the air squeezed out. Sealed this way and kept in a cool, shaded spot, the paint stays wet for several hours, so you can skip a full wash before the second coat. For an overnight gap, put the wrapped brush in the fridge to slow drying even more.

Can You Use a Wire Brush to Clean Paint Brushes?

Yes, a wire brush or stiff paint comb works well for lifting dried paint, especially from around the metal ferrule where buildup hides. Work gently and along the bristles rather than across them, so you do not shred the flagged (split) tips that let a good synthetic brush hold paint and cut a clean line.

Can You Keep a Paint Brush in the Fridge?

Yes, a wrapped paint brush keeps well in the fridge because the cold slows the paint from drying, buying you up to about a day between coats. Seal the bristles in plastic first so no paint transfers to food. Skip the freezer, though; the goal is to slow drying, not freeze the paint solid, and a frozen brush is useless until it thaws.

Can You Soak Paint Brushes Overnight?

You can soak a paint brush overnight, but never let it rest on its bristle tips. The brush’s own weight bends the bristles into a permanent curl that wrecks the shape and the cut line. Instead, drill a small hole in the handle and hang the brush from a wire or rod so the bristles stay fully covered by the liquid but float free of the container’s bottom.

How Long Should a Paint Brush Last?

A good-quality paint brush can last many years, even decades, as long as you clean it right after each use and store it in its cardboard keeper. What kills most brushes early is dried paint left in the ferrule, not age. Cheap disposable chip brushes are the exception; they are built for a single job and are not worth the effort to save.

How Do I Dispose of Dirty Paint Water?

For latex paint water, let the bucket sit undisturbed for a few days so the paint solids settle to the bottom. Pour the clear water off the top onto a gravel or grassy area away from storm drains and gardens, or down a sink that runs to a municipal sewer. Let the leftover sludge dry out, then scrape it into the trash. Solvent from oil-based paint is different and never goes down any drain; take used mineral spirits to a hazardous waste facility instead.

How Do You Dispose of Used Mineral Spirits or Paint Thinner?

Take used mineral spirits and paint thinner to a household hazardous waste facility, which many towns run for free. Never pour solvent down a drain or storm sewer, and never put it or solvent-soaked rags in the household trash, since the CDC puts the flash point of Stoddard solvent, the usual mineral spirits, at 102 to 110 degrees Fahrenheit ⁽²⁾. To reuse it, pour the dirty solvent into a sealed container, let the paint solids settle over a few days, then pour off the clear spirits on top; a coffee filter speeds up the separation.

Remember to Clean Your Brushes

Cleaning a paint brush well comes down to three habits. Match the solvent to the paint: warm soapy water for latex and acrylic, mineral spirits for oil-based, denatured alcohol for shellac, and lacquer thinner for lacquer. Keep the sludge and used solvent out of the drain by letting the solids settle in a container, then taking the hazardous leftovers to a waste facility. Dry the brush bristles-down so water never pools in the ferrule, and slide it back into its cardboard keeper to hold the chisel shape.

Do that after every job and a decent brush stays soft and straight for years instead of stiffening into a throwaway.

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