- Take full or partial containers of mineral spirits to a hazardous waste disposal facility or safe waste disposal event in your city.
- Pour small amounts of mineral spirits into kitty litter and toss it in your regular trash once it solidifies. Put dry empty containers in your recycling bin.
- Keep soaked rags in an oily waste can with water until you’re able to take them to a hazardous disposal site.
Mineral Spirits Disposal
Take the mineral spirits to a hazardous waste collection facility. Mineral spirits are household hazardous waste, so contact your area’s waste disposal service to find the closest facility. Bring the mineral spirits in their original sealed container so they can safely dispose of it. You may have to pay a small fee for mineral spirits disposal depending on where you live and how much you’re getting rid of. Never pour mineral spirits down the drain because they could contaminate the groundwater and harm plants and animals. Do not put mineral spirits in your regular trash because it’s flammable and could spontaneously combust. Disposing of mineral spirits may vary between cities, so always contact your waste collection service or city commissioner's office to find out the proper method.
Bring the mineral spirits to a hazardous materials waste disposal event. Many cities host free disposal events to limit the amount of pollution in the environment. Call your city commissioner’s or council’s office to find out when the next event is happening.
Mix mineral spirits with kitty litter to put it in your trash. Line a garbage can with plastic garbage bags and pour in the cat litter. Add the mineral spirits to the litter a little at a time. Once the mineral spirits and litter solidify, tie the bag and put it in your trash. This works best if you’re getting rid of less than 1 cup (240 ml) of mineral spirits. Work outdoors in an area away from children or pets.
Store rags in oily waste cans until you can dispose of them. Oily waste cans are made of metal and have a tight lid so rags soaked with mineral spirits can’t spontaneously combust. Toss any used rags in the can along with soap and water. Put the lid on tightly. Keep the oil waste can away from heat sources and direct sunlight. Once the bin is full or when there’s a hazardous waste collection day, take it in to have it properly disposed of.
Leave empty containers open to dry to put in your normal recycling. If the container is completely empty, take the lid off so any residual mineral spirits can evaporate. Once it’s dry, the remaining residue will be safe to put in your recycling bin or take to a recycling center.
Reusing Mineral Spirits
Pour mineral spirits back into the original container after using them. Use a funnel to put any used mineral spirits into the container without spilling. Seal the lid as tightly as possible, and place it in a well-ventilated space away from any heat sources or open flames. Mineral spirits can ignite when they reach 105 °F (41 °C), so store them in a cool place away from other combustible materials.
Leave used mineral spirits alone to let paint residue settle. Mineral spirits do not go bad or expire, so you can continue reusing them for projects. Allow the mineral spirits to settle, letting the paint sink to the bottom. The next time you need to use some, just pour out some of the clear liquid on top. It may take several months for old paint residue to completely settle on the bottom of the container.
Pour used mineral spirits through a coffee filter to remove old residue. If you don’t want to wait for the residue to settle in used mineral spirits, find a resealable solvent container made from metal or glass. Place a few coffee filters over the opening and pour off the mineral spirits into the new container. Label the container so you know it contains mineral spirits before storing it for future use. Mix the paint residue with cat litter or leave it outdoors to dry. Once the residue is solid and dry, toss it in your regular trash. Many art supply stores and hardware stores carry containers to use for solvents. Avoid plastic containers because the mineral spirits may break down the plastic over time.
Add mineral spirits to oil paints to make them thinner. Mineral spirits work for thinning oil-based paints used for your home or art projects. Add small quantities of mineral spirits until the paint reaches the consistency you want for your painting. Mineral spirits give paint a slightly smoother, more level appearance once it dries. If the consistency gets too thin, add more paint to the mix. Overly diluted paint may not bind properly to the canvas.
Donate extra mineral spirits to someone who will use them. Contact local construction co-ops, art schools, or learning centers to see if they could use any leftover mineral spirits you have. That way, they continue getting used and don’t go to waste.
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