Paint Shelf Life Explained
Most homeowners have a few cans of leftover paint sitting in the garage or basement. But when it’s time for touch-ups or a new project, the question always comes up: Is this paint still good? Using expired paint can lead to uneven coverage, poor adhesion, and wasted time. Here’s how to know whether your old paint is a money-saver—or a mistake waiting to happen.
How Long Does Paint Last?
Unopened latex paint: Up to 10 years if stored properly.
Opened latex paint: Typically 2–5 years depending on conditions.
Oil-based paint: Can last up to 15 years unopened.
Chalk or specialty finishes: Shorter lifespan, often 1–3 years.
Signs Your Paint Has Expired
Check these warning signs before you pick up a brush:
Strong odor: Sour, rotten smells mean bacteria has grown inside the can.
Thick clumps or lumps: Dried or rubbery chunks indicate the paint has separated.
Separation that won’t mix: If stirring doesn’t return it to a smooth texture, it’s unusable.
Mold or film on the surface: Obvious contamination = toss it.
How to Store Paint Properly
To get the most life out of your paint, follow these storage tips:
Seal it tight: Use a rubber mallet to gently close the lid without denting it.
Label the can: Write the room and color on top for easy identification later.
Store indoors: Keep paint in a temperature-controlled space (not the garage).
Turn the can upside down: Creates a tight seal that minimizes air exposure.
Can You Still Use Old Paint?
If the paint mixes smoothly, smells normal, and spreads evenly, it may still be good to use—especially for smaller projects or primer coats. However, for best results (and peace of mind), fresh paint will always give you the most reliable coverage and finish.
Paint doesn’t last forever, but knowing how to test it can save you time and money. When in doubt, it’s better to invest in a fresh can than risk your project with expired paint.
At Black Mountain Painting, we use only premium, fresh paints to ensure every project lasts for years. Contact us today to refresh your home with colors that are vibrant, durable, and guaranteed to impress.