Does Paint Expire? How Can You Tell?
Paint feels like something that should be able to last forever. If you keep the can sealed, what could go wrong? Unfortunately, paint can and does go bad, and reusing old supplies only works if the paint is still in decent shape. Here’s how to figure out if your spare can is worth saving or tossing.
How Long Does Paint Last?
Paint doesn’t come with a strict expiration date, but its shelf life depends on how it’s stored and the type of paint. Latex paint can last up to 10 years when sealed and kept in a cool, dry place. Oil-based paint can stretch a few years longer. Once a can is opened, though, the clock ticks faster. If the lid’s not tight or the can’s been in extreme temperatures, that shelf life shortens quickly, often by years.
Signs Your Paint Has Gone Bad
The first step in telling if paint’s expired is to open the can. If there’s a sour, rotten smell, it’s no good. Paint that’s separated with thick, rubbery clumps or has a crusty film on top probably won’t mix back to a usable state. Mold or other odd textures are also red flags. If it smells fine but stirring doesn’t bring it back to a smooth, even consistency, it’s still safer to let it go.
Can You Still Use It?
If the paint smells fine and stirs smoothly, even after sitting for a few years, it might still be usable. Always test it first, either on a piece of cardboard or some spare wood. If it rolls or brushes on evenly, without any streaks or lumps, you’re likely in the clear. For touch-ups or primer coats in less-visible spots, slightly older paint can work, even if the texture is off, but for anything more important, using fresh paint is always a better call.
Storing Paint the Right Way
To keep leftover paint usable, store it in a tightly sealed container in a spot that doesn’t get too hot or cold. A basement or indoor utility closet works better than a garage or shed for this reason. Wipe paint from the rim before closing the lid to ensure a tight seal. Some people even transfer small amounts into airtight jars for easier access and better preservation, especially for touch-ups down the road.
Safe Ways to Get Rid of Bad Paint
Say your paint is expired, what should you do with it now? Most towns have specific disposal rules for household paint, as it’s not something you can just pour down the drain and be done with. If it’s latex and completely dried out, you can usually toss it with your regular trash. If it’s still liquid or oil-based, check your local hazardous waste collection site. Some hardware stores will even take it back.
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Paint can last longer than you think, but it’s still not forever. If it smells fine, stirs well, and applies smoothly, it’s probably safe to use. If not, don’t risk it, and make sure you dispose of it properly. With the right storage and awareness, you can make the most of every can and avoid waste—both on your walls and in your wallet.
Daniel Mitchell
