Everything You Need to Know Before Reusing Old Paint
When you are looking to touch up that scuff on the wall of your living room, or when you are about to paint a whole room, you may ask yourself, “Can I use this old can of interior paint that has been sitting in the garage?” The short answer, “Yes, sometimes.” However, interior paint does have an expiration date, and old or expired paint may lead to bad-looking finishes, unpleasant smells, and time that is wasted.
We Will Deconstruct in This Article:
- The lasting duration of interior paint
- When to know whether your paint is expired or not
- How to store paint properly
- How to dispose of old or expired paint
Let’s dive in.
How Long Does Interior Paint Last?
Shelf Life Depends on the Type of Paint
Different kinds of paint have various lifespans.
The Following is a Rough Rule of Thumb When Cans are Not Opened:
- Water-Based Latex Paint: Not more than 10 years
- Oil-Based Paint: Up to 15 years
The shelf life, however, becomes shortened when the can is opened because it is exposed to air and moisture.
Opened vs. Unopened Paint
- Unopened paint stored in an appropriate manner can have a near-maximum shelf life.
- The average life of opened paint is 2 to 5 years depending on the manner in which it has been sealed.
So, when you painted your bedroom five years ago and have half a can in your basement, it may be all right–but it’s time to look at it carefully.
How to Determine Expired Paint
Here are some of the obvious indicators that your paint is expired before you open up the lid and begin painting:
Bad Smell
Open the can and take a sniff. When it stinks of rotten eggs, mold, or anything other than the usual paint smell, it is out of condition. Bacteria may develop in the paint, particularly those made of latex, and it becomes unsafe to use at home.
Separation
A little bit of separation is good – particularly with latex paint. On the surface you may find a watery layer. Try stirring it. If it is blended again to a smooth consistency, it can still be used.
However, when it is still lumpy, or stringy, or will not mix smoothly, it is time to toss it.
Lumps or Chunks
Paint that has expired may form thick clumps or resemble cottage cheese. If you stir it and the texture does not become smooth, then it will not apply to your walls.
Rust on the Can or Lid
If the can has rusted through or the rust has settled on the paint, it might come in contact with the color and texture. Mostly, it is always wise to be on the safe side and dispose of it.
Proper Paint Storage: How to Extend Its Life
One of the main considerations of leftover paint is to ensure it is stored in the best way so that it can be used in the future.
Seal the Lid Tightly
Wipe the rim after every use and close the lid with a tight mallet (not a hammer).
Store in a Cool, Dry Place
Store paint somewhere that maintains a constant temperature such as a basement or utility closet in the house.
Avoid:
- Garages or sheds, which tend to heat or get cold to excess
- The presence of high humidity that can promote the growth of mold.
Hint: Do not go below 35-degrees F or exceed 85-degrees F.
Label Your Paint
Include:
- Room or project used for
- Date of purchase
- Brand and color code
This makes it easier to match and use later.
Can You Use Expired Paint?
Test Before Use
If you have paint that is less than 5 years old, smells fine, and mixes well, then it is probably safe to use. Test a patch on a hidden place.
Let it Dry and Observe:
- Even coverage
- No strange smell
- Smooth texture
If it checks out, you are good to go.
Where to Avoid Using Old Paint
Old paint may appear to be okay.
But Do not Use it on:
- High-visibility walls
- Kitchens and bathrooms
- Trim and baseboards
You Can Use Old Paint for:
- Priming unfinished wood
- Garage or basement walls
- Arts and crafts projects
What Happens If You Use Expired Paint?
Painting With Out-of-Date Paint Can Result in:
- Peeling and cracking
- Uneven texture
- Discoloration
- Lingering Odors
It can also not adhere very well particularly on high-traffic locations. Worst case scenario: you will need to re-paint everything, that is, to spend twice as much time and effort.
How to Dispose of Old or Expired Paint
Don’t Just Dump It
Do not pour paint down the drain or dispose a full can in the trash. It’s hazardous waste.
Dry It Out First
If there’s Only a Little Left:
- Do not close the lid and allow it to air dry.
- Add cat litter or hardener to paint to accelerate drying.
It may normally be placed in the general garbage once fully dried but consult your local waste disposal authority.
Find a Local Disposal Site
Search on the internet and type “paint disposal near me.”
Or Use Programs Such As:
- Earth911.com
- PaintCare.org
- Hazardous waste days in your local city or county
Certain home improvement stores even take old paint.
Eco-Friendly Alternatives
Don’t want to waste paint?
Donate It
If the Paint is Still Good:
- Give to community schools, churches, or charities.
- Habitat for Humanity tends to take used paint.
Recycle It
There are places where the paint is recycled. The oil-based paints are more difficult to recycle, whereas the latex paints can be accepted.
