Yes, you can buy mineral spirits in California, but only reformulated low-VOC versions. Traditional mineral spirits are nearly 100% volatile organic compounds by weight, and California caps non-aerosol paint thinners and multi-purpose solvents at 3% VOC by weight. What sits on California shelves is a fundamentally different product from what’s sold in most other states, sold under labels like “low-VOC mineral spirits,” “odorless mineral spirits,” “mineral spirits substitute,” or “California compliant.”
What You’ll Actually Find on the Shelf
Walk into a California hardware store, paint supply shop, or home improvement chain and you’ll see compliant formulations rather than the traditional product. Online retailers that ship to California stock the same reformulated versions. The labeling is usually easy to read once you know what to look for:
- A VOC content declaration, often stating “less than 3% VOC by weight” directly on the can.
- California compliance language such as “Formulated to meet California VOC limits” or “CARB compliant.”
- If you’re in the greater Los Angeles area, a check that the label does not say “Not for sale in SCAQMD.”
That last point matters for roughly half the state’s population. If you live in Los Angeles or Orange County, or the western portions of Riverside and San Bernardino counties, you’re inside the South Coast Air Quality Management District, which layers its own 25 g/L VOC limit for consumer paint thinners and multi-purpose solvents on top of the statewide rule. Some products sold legally elsewhere in California still carry a “Not for sale in SCAQMD” notice, so read the can before you head to the register.1Cornell Law School. Cal. Code Regs. Tit. 17, 94509 – Standards for Consumer Products
The VOC Rule Behind the Restriction
The California Air Resources Board sets VOC content limits for consumer products under Title 17 of the California Code of Regulations, Section 94509. The regulation prohibits selling, supplying, or manufacturing for sale in California any consumer product exceeding the VOC limits in its Table of Standards.1Cornell Law School. Cal. Code Regs. Tit. 17, 94509 – Standards for Consumer Products
For non-aerosol paint thinners and multi-purpose solvents, the statewide limit is 3% VOC by weight, a standard that took effect at the end of 2013. Aerosol versions face a 10% VOC limit that took effect on January 1, 2016.1Cornell Law School. Cal. Code Regs. Tit. 17, 94509 – Standards for Consumer Products
To put the 3% cap in perspective, traditional mineral spirits are almost entirely composed of VOCs. Meeting the limit required removing or replacing roughly 97% of the solvent’s original active ingredients. The driver behind the rule is California’s smog problem: VOCs react with nitrogen oxides in sunlight to produce ground-level ozone, and the Los Angeles basin and Central Valley trap those air masses for days at a time.
How Compliant Mineral Spirits Perform Differently
Low-VOC mineral spirits do the job, but they don’t behave the same way as the traditional formulation. Removing the most volatile aromatic compounds, particularly toluene and xylene, cuts both the solvent strength and the evaporation rate. That tradeoff is worth understanding before you start a project.
Odorless mineral spirits evaporate noticeably slower than the traditional version. For brush cleanup, that’s barely relevant. For thinning oil-based finishes, the slower evaporation can actually extend your working time, though it also means longer drying periods between coats in cool or humid conditions.
The bigger practical issue is reduced solvency. Low-VOC mineral spirits are weaker solvents, so they can struggle with thicker resins or heavily dried paint. Routine brush cleaning and light thinning feel about the same. Stripping stubborn finishes or degreasing heavy equipment may call for more aggressive application or a purpose-built degreaser rated for the task.
Some manufacturers now sell separate product lines for thinning versus cleaning because the performance demands differ. Crown, for example, markets a VOC Compliant Mineral Spirits Substitute specifically for cleaning and states on the label that it is not intended for use as a thinner, recommending a separate product for thinning tasks.
Bringing Traditional Mineral Spirits In From Out of State
The CARB regulation targets selling, supplying, and manufacturing for sale within California. It does not criminalize personal possession. If you drove to Nevada, bought traditional mineral spirits, and brought a can back for your own garage project, you wouldn’t be violating the consumer products rule. Hauling flammable solvents across state lines creates its own transportation and safety headaches, and compliant products are available in every corner of the state, so for most buyers it isn’t worth the trouble.
Storing Mineral Spirits at Home
Even low-VOC mineral spirits are flammable liquids. The flash point of most mineral spirits falls below the 140°F threshold that classifies a liquid as ignitable under federal hazardous waste rules, so fire safety matters regardless of which formulation you buy.2eCFR. 40 CFR Part 261 – Identification and Listing of Hazardous Waste
The practical storage rules for home users are straightforward. Keep the product in its original sealed container. Store it away from heat sources, water heaters, and pilot lights. Never transfer it to an unmarked container. If you’re using the solvent indoors, open windows and run a fan; extended exposure to vapors can cause headaches, dizziness, and respiratory irritation, and prolonged skin contact can dry and crack the skin.
Disposing of Used Mineral Spirits in California
You cannot pour used mineral spirits down a drain or throw them in the trash. California classifies solvents as household hazardous waste, and the Department of Toxic Substances Control requires you to bring them to a household hazardous waste facility.3Department of Toxic Substances Control. Household Hazardous Waste
Most California counties and larger cities operate permanent household hazardous waste collection sites or hold periodic collection events, typically free for residents. Check your local waste management agency’s website for drop-off locations and hours. Some facilities accept walk-ins; others require appointments.
Under federal law, used mineral spirits typically qualify as characteristic hazardous waste due to their ignitability, carrying EPA Hazardous Waste Number D001.2eCFR. 40 CFR Part 261 – Identification and Listing of Hazardous Waste That classification applies to low-VOC formulations too, as long as the flash point stays below 140°F.
One tip that cuts down on trips to the collection site: if you use mineral spirits for brush cleaning, let the dirty solvent sit in a sealed jar for a few days. Paint solids settle to the bottom, and you can carefully pour off the cleaner liquid on top and reuse it. You’ll still eventually need to dispose of the sediment, but you’ll go through far less product in the meantime.