It’s easy enough to spot bad paint from its odd texture or funky smell.
Learn more about when specific types of paints expire and how to keep them usable longer.
How Long Does Paint Last?
The Spruce / Margot Cavin
Most paints last one to two years in an open can.
Latex paints can last an average of 10 years in an unopened can.
Oil-based paint lasts up to 15 years in an unopened can.
Water-Based Latex Paint
Water-based latex paint could last between two and 10 years.
Behr notes that its interior latex paint’s shelf life is “years.”
However, the consensus among experts is that unopened latex paint has a shelf life of 10 years.
Chalk Paint
Chalk paint lasts one year according to Annie Sloan, the paint manufacturer.
However, the company notes that it can “potentially last for several years.”
Chalk paint does not film over like latex paint but will develop a thicker consistency.
Revive thickened older chalk paint with water.
Milk Paint
Mixedmilk paintlasts only a day or two because it contains milk proteins.
If refrigerated, milk paint may last up to a week.
Some milk paints have additives that preserve them longer.
Dried powdered milk paint can last indefinitely if kept in a dry, cool place.
Other paint might smell like mold or mildew.
If the smelly paint is applied, the odor may lessen but not disappear.
Bacterial growth is the driver behind this smell.
Paint experts, though, tend to agree that repeated freeze-thaw cycles will eventually break down paint.
Solidified paint chunks cannot be dissolved by adding water.
Try addingwater to latex and water-based paintto thin it out.
Addpaint thinnerto oil-based paint to improve the consistency.
However, toss it out if the rust has contaminated the paint inside.
Rusty paint stains a surface.
Do not use any paint with mold or mildew growth.
Properly dispose of the paint can at a hazardous waste facility.
All paint will separate over time.
Water-based latex paints don’t have the same environmental concerns, so these can be thrown out normally.
To help latex paint solidify, pour it into an absorbent material, like shredded newspaper.
Local regulations may vary so call local authorities to confirm the best method.
Expired paint will not adhere as well as fresh paint.
More risky is that bad paint could release more hazardous fumes and VOCs.
It is not recommended to store paint in a garage.
Oil paint can be softened by setting the can in hot water and adding paint thinner.
Does Paint Expire?.Glidden Paints.
