How to Properly Store and Reuse Leftover Paint

Whether you’ve just finished painting your living room walls or added a splash of colour to your garden shed, there’s a good chance you have a little paint left in the tin. In fact, it’s pretty rare that you have exactly the amount of paint you need and nothing more. Instead of tossing your leftover paint out or letting it dry up in the garage, you can store it properly to use at a later date.  With the right storage methods, leftover paint can be a cost-effective and eco-friendly solution for future touch-ups and more.

Read on to learn how you can  make the most of every drop.

• Cost savings: Avoid spending money on buying more paint for touch-ups or small areas.
  
  

• Colour matching: Having the original paint on hand makes it easy to match exactly if you need to repaint a spot.
  
  

• Eco-conscious: Reducing waste means less impact on the environment.
  
  

• Creative reuse: Leftover paint is perfect for DIY décor, crafts, or revamping furniture.

When stored correctly, water-based (emulsion) paints can last up to 2 years, while oil-based paints may remain usable for as long as 15 years. Here’s how to keep it ready to use for as long as possible.

1. Keep it in the original container if you can

The best place to store leftover paint is in its original tin, which is designed to keep it sealed and stable.Be sure to wipe off excess paint from the rim before closing. Then, tap the lid shut securely with a rubber mallet, not a hammer, to prevent damaging the seal.

2. Minimise air exposure

As you may have guessed, air is paint’s worst enemy once the tin is opened. If you only have a small amount of paint left, transfer it to a smaller airtight container (like a glass jar with a screw lid) to reduce air exposure. Be sure to label the container with the details of the paint and the application as well as the date.

3. Store paint in a cool, dry place

Temperature extremes can ruin paint. For this reason, we suggest you  avoid garages or sheds that get too hot in summer or freeze in winter. A basement, utility room, or cupboard is ideal.

4. Avoid opening the paint as much as possible 

Every time you open a paint container, you introduce air and risk contamination from dust or debris. Only open it when you're ready to use it, and avoid frequent checks “just to see” how it’s doing. If you must check the condition, stir gently and reseal the container immediately afterward. The less exposure, the longer your paint will last.

Remember: Before reusing any leftover paint, it's important to check its condition. If the paint has a sour smell, has separated and won’t mix back together, or has developed a chunky or mouldy texture, it’s no longer suitable for use and should be disposed of responsibly.

• Touch up scuffs and scratches on walls or trim.

• Paint furniture such as side tables, picture frames, or shelves.

• Add colour to plant pots, stair risers, or drawer interiors.

• Create wall art or use for stencilling or accent details.

• Donate it to local schools, charities, or community centres may welcome unopened tins.
  

If the paint is no longer usable, don’t pour it down the drain or throw it in the bin, as it can be harmful to the environment. Empty paint cans can be recycled at Crown Decorating Centres, but keep it that waste paint needs checked with local authorities. Check with your local council for guidance on hazardous waste disposal or upcoming drop-off events. In some areas, there may also be paint recycling schemes available that allow you to safely and responsibly dispose of or even repurpose old paint.

Storing and reusing leftover paint isn’t just smart, it’s sustainable! With a little care, that extra half-tin on your shelf could come in handy for years to come. So before you throw it out, think about how that paint can still add colour to your world.