Reusing old paint is a great way to go green and reduce expenses on your next DIY project. But does paint go bad? Before you dive into a project, it’s a good idea to check to make sure your paint hasn’t gone bad while it’s been in storage. Improperly stored paint can spoil or be prone to quicker peeling, so you can’t simply grab a can off the shelf and get started before you’ve inspected it carefully.
We’ll clue you in on everything you need to know if you suspect you might be dealing with a batch of house paint that’s past its prime. Let’s take a look at how long is paint good for, why it goes bad and what to do if it’s over the hill.
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Does Paint Go Bad?
The answer is yes, all types of paint can go bad. The difference lies in how long they typically last before they turn on you. Here’s a chart that offers broad estimates on how long is paint good for, by type.
| Type of Paint | Average Lifespan |
| Latex paint | 2 - 10 years |
| Acrylic paint | 2 - 15 years |
| Chalk paint | 1 - 5 years |
| Milk paint, mixed from powder form | 1 - 7 days |
| Milk paint, premixed in can | 1 - 2 years |
Use the above ranges and the following questions to decide whether it’s time to buy new paint:
- Was the container of paint already opened?
- How well was the container sealed?
- Where has it been stored?
- At what temperature has the paint been stored?
What Are the Different Types of Paint?
While all those cans you’ve got stacked up in storage may look the same, it’s important to understand that there are big differences among paint types that affect how long they’re good for. Latex, oil-based acrylic, chalk and milk paint are different substances with their own expiration dates.
Latex Paint
Latex paint is a versatile, water-based paint that can be used on interior or exterior jobs. Since it’s mostly made up of water, latex paint contains fewer toxins than oil-based paint, but it’s much more susceptible to freezing. When stored correctly, latex paint can last between 2 and 10 years.
If you live in a cold climate, it’s best not to store latex paint in a garage or storage space that’s not climate-controlled, since repeated freeze/thaw cycles can make your paint lumpy. Minor lumps can be gently stirred out with a paint stick, but if the problem is severe, you likely won’t be able to achieve an even coat of paint on your walls. In a case like this, it’s time to dispose of the latex paint and buy a fresh can.
Oil-Based Acrylic Paint
Oil-based paint is a beautiful, thick paint that spreads easily on just about any surface. But it’s more likely to contain volatile organic compounds (VOCs) than its water-based peers—and since it’s oil-based, this type of paint is much more likely to separate when it spends a long time on the shelf.
When properly sealed in a container, oil-based paint boasts the longest shelf life of any type of paint. A can that’s been opened and properly resealed may easily last a decade in storage, while unopened paint can last up to 15 years. However, a word of caution: When oil-based paint is left partially opened, it dries out rather quickly. And as it dries, it releases toxic fumes that could cause a fire. So it’s wise to be extra cautious when it comes to storing acrylic paint.
If your oil-based paint has separated but looks and smells fine otherwise, a simple stir will have you ready to go in no time.
Chalk Paint
Super thick and smooth, chalk paint is the ideal medium for small projects like furniture or doors. It dries to a beautiful matte finish for a modern look or can be layered, distressed or sanded.
While chalk paint can last from 1 to 5 years if stored properly, chalk paint will dry up much faster than that if left exposed to air. If your chalk paint has thickened considerably since last use, know that you can thin it with water if you’d like to use it again.
Milk Paint
The paint with the shortest shelf life of all is milk paint. This thick paint is made with absolutely no harmful chemicals, making it ideal for jobs where children or even animals are involved. But the added milk proteins in this type of paint give it a shelf life of just a few days to a week once it’s mixed.
Pre-mixed varieties that come in a tightly sealed can will last longer and can last up to a year if sealed properly. Keep in mind that milk paint can and should be refrigerated if you have to take a break in the middle of your paint job.
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How to Tell If Paint Has Gone Bad
Chunky, lumpy, or smelly—all of these (unattractive) descriptors are indications that your paint may have started to go bad. Repeated freeze and thaw cycles can cause paint to get lumpy, which means you likely won’t get that smooth, beautiful finish you’re hoping for when you paint your walls.
Rancid odors in paint likely indicate bacterial growth, so you should never use paint that smells bad. Trust us—if it smells bad in the can, it will smell bad on your walls, so it’s best to skip this paint and buy a fresh can.
In general, it’s okay to use paint that has separated. Simply turn the can upside down a few times, give it a gentle stir or use a paint stick to reincorporate the paint. If you’re unsure whether the paint can be used or not, take a trip to the paint store, where you can obtain a professional’s opinion.
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FAQs
A previously opened can of paint lasts 5 years on average if properly sealed and stored. Old paint shelf life can also vary among different types of paint. In particular, an unopened can of latex or acrylic paint lasts up to 10 years.
How long does paint last once opened? ›
A previously opened can of paint lasts 5 years on average if properly sealed and stored. Old paint shelf life can also vary among different types of paint. In particular, an unopened can of latex or acrylic paint lasts up to 10 years.
How can you tell if paint has gone bad? ›
How To Tell If Paint Has Gone Bad
- Paint is moldy or smelly: Paint that sits in storage for a long time may begin to mold or mildew if it has a bacterial contamination. ...
- Paint is “chunky”: Paint that sits for a long time will settle, so you'll have to stir it properly before beginning to use it.
Unopened latex and water-based acrylic paints can last up to 10 years and alkyd and oil-based paints can last up to 15 years. Unopened paint maintains its ratio of liquids and semi-solids which is why it's fine to use after a long period of time.
Is 20 year old paint still good? ›
If it's unopened, it's probably still usable.
Unopened cans of paint last for years when stored correctly. Unused latex and water-based acrylic paints last up to 10 years, and the shelf life of alkyd and oil-based can be as long as 15 years.
Does paint go bad if stored properly? ›
When stored properly, an unopened can of latex or oil-based paint should have a shelf life of 2 years. The best storage for paint is in a cool, dry area, away from extreme hot and cold temperatures. Paint should never be allowed to freeze and should be stored away from furnaces and other heat-generating appliances.
How long can paint sit and still be good? ›
A can that's been opened and properly resealed may easily last a decade in storage, while unopened paint can last up to 15 years.
What happens if you use gone off paint? ›
What happens if I use paint that has gone off? The simple solution here is not to use off paint. If you are painting a ceiling or wall with off paint, you will encounter a few problems. It won't adhere as well to the surface and will most likely come up patchy when dry.
Is it OK to use paint that has separated? ›
*If your old paint has separated but blends together nicely once mixed, its probably ok to use. *If your old paint is really chunky, it's too old to use. *If your old paint has a jelly consistency, it's too old to use.
How long does paint last in a bucket? ›
This depends on whether you've maintained the proper storage conditions. New, never-opened cans of latex or oil paint usually last about three years. If you store a can of opened paint properly and don't expose the paint to air, it may last up to a couple of years.
The good news is that if you have an unopened can of paint that has been stored properly, it's almost guaranteed to still be fine to use. Unopened latex and water-based acrylic paints can last up to 10 years and alkyd and oil-based paints can last up to 15 years.
How long does Sherwin Williams paint last? ›
Latex or Acrylic-Latex Paint
PPG and Glidden both suggest their latex paint, unopened should last two years. Sherwin-Williams and Behr each say a year. Most experts, outside of the manufacturers say well-preserved paint can be shelf-stable for up to 10 years.
Can paint last 100 years? ›
Unopened cans of paint last for years when stored correctly. Unused latex and water-based acrylic paints last up to 10 years, and the shelf life of alkyd and oil-based can be as long as 15 years. Latex, oil-based acrylic, chalk and milk paint are different substances with their own expiration dates.
How often should you replace paint? ›
In general, most interior paint jobs last between 5-7 years. If you invest in high-quality paint products that are professionally applied, some interior paint jobs can easily last 10 years or more.
Can mold grow in paint? ›
Yes — mold can grow on painted walls and surfaces if there is excess moisture. Most types of paint contain organic compounds that can be metabolized by mold, such as plasticizers. Oil paints are especially susceptible to mold because they contain more of these organic compounds compared to water-based paints.
Where not to store paint? ›
Paint should be stored out of reach of children and away from food and drink. Most types of leftover latex paint, including AURA®, REGAL® and ben®, should be stored either in a lined metal can to prevent rust, or a glass or plastic container.
Will Lowes shake old paint? ›
Lowes does not have to put a sign reading, “We will shake anyone's paint!” However, if they made an effort to say yes to a customer's needs whenever possible, they would create an open, welcoming atmosphere, they would open the door to new sales opportunities and unparalleled customer loyalty.
How often should you paint your house? ›
Most homes need to be painted every 7 to 10 years, but the actual timeframe varies by material and region. For example, cement fiberboard siding needs repainting every 10 to 15 years, but more traditional cladding needs painting more often.
How long does latex paint last once opened? ›
Mixed Paint Shelf Life Estimates
| Paint Type | Lifespan |
|---|
| Latex or Acrylic-Latex Paint | 2 to 10 years |
| Oil-Based Paint | 2 to 15 years |
| Chalk Paint | 1 to 5 years |
| Milk Paint | 1 to 7 days |
May 4, 2022
Behr's water-based paints should be good for two years, says Edrosa, while Sherwin-Williams' cans boast a three-year shelf life, says Fiorilli.
Use the Same Paint and Color
Using your leftover paint, shake the can before opening. Then open the can and stir the paint. If the paint has thickened over time, thin it down with a thinner or water. Make sure to also use the same paint finish for the touch up.
What does old paint smell like? ›
We've got the scoop on why old paint smells so bad and it is simply a buildup of bacteria and mould that causes it to smell like sour milk (OR MUCH WORSE). Bacteria sometimes gets into the paint from the manufacturer but it is most likely to becomes contaminated once opened.
Will Home Depot shake old paint? ›
Paint Shake and Re-Tints
If you bring your old paint to a Home Depot paint center, you can have it shaken up in their machines.
Is it best to remove paint before painting? ›
Paint removal is highly recommended, in preparation for a new coat of paint. If the surface the new paint adheres to is a previous coat, it will peel far sooner than the paint correctly applied to a good surface.
Should you remove all paint before painting? ›
That depends on your project. Some people choose to skip this important step, but they're missing out on some of the benefits paint stripping provides. Both individuals and businesses have situations where they need to paint strip, and removing old paint gives you a fresh start and a more even new coat of paint.
Does WD 40 restore paint? ›
If another car got a bit too close and left a small paint scuff on your car, a little WD-40 may do the trick. While not recommended for large areas, small amounts of paint transfer can be effectively removed with WD-40. Wash off the area with soap and water back to its original finish.
What paint to use over old paint? ›
- You can use a primer to thoroughly cover the old color, then apply 1 or 2 coats of the new paint.
- Paint & primer in one paints are a newer option, which could be ideal for your situation and even shorten the project.
Start with adding a drop or two of warm water, stirring it for a minute, then leave it overnight. If that wasn't enough to fix the paint, it's better for you to replace it with a new kit. You can do the same thing for hardened liquid clear acrylic substitute.
Can you store paint in a 5 gallon bucket? ›
This is not ideal for storage, as too much air can reside in the can over a long period of time, drying it out as a result. If, for example, you have less than a gallon of paint left in a large five-gallon bucket, it's important to consolidate that paint into a smaller container.
Do you have to shake paint before using it? ›
Paint should always be stirred before use. This recombines any components that have separated, and ensures the coloring is evenly distributed throughout the paint. It should also be professionally shaken at the store, but you do not need to re-shake the paint directly before use. This is the official answer.
Ensure paint stays viable by storing it in a sealable container that's just big enough to fill all the way with your excess. A small metal can (like Behr's 1-qt. Metal Paint Bucket and Lid, $3.42; Home Depot) is ideal; plastic containers may increase off-gassing.
What house paint lasts 25 years? ›
Ceramic paint can be up to 8 times thicker than regular latex paint and can last up to 25 years. Properly applied, a ceramic coat might be the last paint job your home ever gets, so picking the right one is crucial.
Is paint ruined if it freezes? ›
Check the paint after thawing. Freezing does ruin latex paint, but it can survive a few freeze/thaw cycles. Allow the paint to slowly warm up to room temperature, then stir it well. If the paint color and consistency appear normal, then it should be all right to use.
How long does Home Depot paint last? ›
Unopened water based paint and latex paint will last for 10 years if they don't freeze. Leftover paint should be used within two years.
What house paint color lasts the longest? ›
let's take a look at some of the colors that last the longest on exteriors:
- Beige.
- Tan.
- Light brown.
- Light blues.
- White.
- Light green.
Sand the surface to dull the finish (always wear a dust mask when sanding) then apply a coat of adhesion primer then follow with two coats of good quality latex paint. Naturally this system should be tested to ensure good adhesion before starting the whole project.
Does more expensive paint last longer? ›
Most expensive paints last longer so you can wait more years in between repainting your surfaces. In some projects, you can afford to use more affordable paints.
Can you paint a wall too many times? ›
You can paint your walls in your home as often as you like. If you notice a buildup of paint, you can sand the walls down to remove it before the project. You also have the option of using a paint stripper to clean your walls before you apply a new coat of paint.
Should you buy all your paint at once? ›
Before you start, buy all the paint for a room at the same time, and have it shaken at the home center. If you use it within a week, just stir it lightly.
Should you paint your house every year? ›
Painting is a great investment that lengthens the integrity of your home while protecting it from the elements. On average, your house should be painted every 5-10 years depending on the surface type, quality of paint, and signs of wear.
Getting rid of black mold with white vinegar
'Bleach will kill mold spores growing across a hard surface, but if the mold has extended below the surface, then white vinegar is the best choice,' she says. 'The vinegar will penetrate to kill the mold and mildew at the root, preventing it from regrowing.
What kills mold before painting? ›
Mix up a solution of 2 parts bleach with 10 parts water in a spray bottle (an empty cleaning spray bottle will do) and spritz the bleach water onto the walls to kill the mould.
Does kilz prevent mold? ›
“Does Kilz kill mold?” Despite the brand name “Kilz” sounding like it would kill mold, Kilz does not kill mold, but does proactively prevent it.
How do you keep paint fresh after opening? ›
Store leftover paint in a dry place that is out of direct sunlight. Paint should be stored out of reach of children and away from food and drink. Most types of leftover latex paint, including AURA®, REGAL® and ben®, should be stored either in a lined metal can to prevent rust, or a glass or plastic container.
Does paint get lighter or darker as it dries? ›
Does Paint Dry Darker or Lighter? Paints typically dry darker, particularly oil, acrylic, and latex paints. However, that doesn't mean it will look different than what's on the paint swatch. If you mix the paint properly, it should look the same as the color you picked out once it dries.
Is it better to touch up paint with a brush or roller? ›
Use a roller, if possible — A roller will give you better quality and blending than a brush. The preferred roller is a "weenie" roller with a good, quality synthetic cover. Choose a nap thickness of ¼ - to ½ inch. Use less paint — When loading the roller, use the least amount of paint necessary.
Can you store leftover paint in the garage? ›
Never store leftover paint in the garage. When stored in extreme temperatures, paint will change in consistency and become unusable. If the paint is stored for a long period of time, it will turn into hazardous waste and require special disposal.
Can you store open paint in the garage? ›
The simple answer is yes, you can store paint in the garage. Unlike storing paint in an external shed, the extreme in temperatures is not so great.
Should you store leftover paint upside down? ›
If the paint is to be stored for a time, store the cans upside down, for two reasons. The first is that if the can is not sealed, it will show you (by leaking). The second is that it will keep the paint from forming a crust--a layer of congealed (and wasted) paint on top.
Does Home Depot shake paint for free? ›
This one isn't weird so much as unexpected. If you bring your old paint to a Home Depot paint center, you can have it shaken up in their machines. This saves the effort of stirring up your old paint, but it also sets up another great service: paint re-tints.
New, never-opened cans of latex or oil paint usually last about three years. If you store a can of opened paint properly and don't expose the paint to air, it may last up to a couple of years.
