10 Best Paint Thinners in 2026

A quart of completely odorless solvent means you can thin oil-based paints, primers, varnishes, and stains without the harsh fumes that usually fill a room. That makes it a natural fit for indoor projects, especially in spaces where smell matters, like a home studio, a hospital, or a nursing home. It also doubles as a degreaser, cutting through grease, grime, and oil, so one bottle handles both thinning and cleanup. For anyone working in a shared or enclosed space, this is the kind of practical simplicity that keeps the focus on the project, not the odor.

The trade-off is clear: this thinner is not for latex or water-based coatings, so if your project uses those, you will need a different product. It also cannot be sold in California or other VOC-restricted areas, which limits where you can buy it. If you are outside those restrictions and work mainly with oil-based finishes, this quart delivers exactly what it promises: clean, fume-free thinning.

Rust-Oleum’s Low VOC Mineral Spirits is formulated with the lowest odor and leaves no residue, making it a natural pick for indoor work or small, unventilated spaces. Its no-residue formula thins oil-based paints and stains while helping brushes glide smoothly, so you can focus on your strokes instead of fighting drag or cleanup fumes. This quart is ideal for artists and DIYers who want a gentler solvent experience without sacrificing performance.

The quart size limits large projects, so if you need bulk volume for extensive painting, consider a larger container. Compared to Sunnyside’s Pure Odorless Paint Thinner, which is also odorless, the Rust-Oleum quart weighs 1.9 pounds and leaves no residue. For someone who prioritizes a clean, low-fume workspace above all else, this is the right bottle to grab.

A 65% reduction in fumes makes this low-odor paint thinner a welcome choice for anyone who works in a small studio or a room without perfect ventilation. You can thin oil paints, varnishes, and stains to a smooth, even consistency, then use the same bottle to clean brushes and rollers or wipe down surfaces before painting. It tackles tough grease, wax, and adhesive, so your finish sticks better and lasts longer. For artists and DIYers who want a comfortable workspace with less overpowering odor, the low-fume formula keeps the air more pleasant.

The trade-off with low-odor solvents is that some users may prefer a product with even less scent, though the 65% reduction already makes a noticeable difference. If you prefer the slower pace of a product like Sunnyside Pure Odorless Paint Thinner, this one may still suit your needs for cleanup and prep work where speed is a real asset. The low-odor formula means you can spend more time in your creative zone and less time airing out the room.

A soy-based formula that cuts volatile solvent odors makes this a rare find for artists who work indoors without sacrificing dissolving power. It thins oil paints, enamel, and varnishes while also cleaning and conditioning brush bristles to keep them soft and long-lasting. For anyone sensitive to the harsh fumes of traditional turpentine or mineral spirits, this quart delivers a noticeably cleaner experience that lets you focus on your painting rather than the smell.

At 2.0 pounds, this quart of paint thinner has a noticeable heft that makes it less convenient to carry between studios or classes compared to lighter options like the Sunnyside Pure Odorless Paint Thinner, which is listed at 0.0 pounds. The soy additives reduce hazardous vapors, so indoor sessions are more pleasant. However, the formula still contains petroleum distillates, meaning it isn’t fully plant-based. For artists who prioritize low odor and brush care over ultralight portability, this is a practical alternative to standard thinners.

Fast-evaporating naphtha speeds dry time for oil-based paints, so you can move through thinning and recoating more quickly than with slower solvents. It also works as a cleaner and degreaser, and as a pre-paint cleaner for metal surfaces, letting you prep and thin with one quart. That speed is useful for projects where you want to keep work moving without long waits between steps.

Fast evaporation is the key feature here, so it quickens dry time for oil-based paints and works well as a pre-paint cleaner for metal surfaces. If you need a thinner that gets the job done quickly and also serves as an excellent cleaner and degreaser, this quart delivers exactly what it promises. For projects where drying speed matters more than scent, this quart delivers exactly what it promises.

Made from natural plant oils, this thinner swaps harsh turpentine fumes for a gentle citrus scent that makes indoor painting sessions far more pleasant. Its low toxicity and low VOC formulation mean you can work in a classroom or a small studio without worrying about air quality. The biodegradable base is kinder to the planet when you clean up. For artists who prioritize a comfortable workspace and a mild touch on their brushes, this is a refreshing alternative to traditional solvents.

This thinner is formulated from natural plant oils, so it has a pleasant citrus scent and low odor, making it a safer alternative to turpentine for indoor use or classrooms. It works well for thinning oil paints, cleaning brushes, and dissolving natural resins, but because it’s gentle, it’s best suited for fresh paint rather than dried-on messes. If you prioritize a low-toxicity, biodegradable solvent that won’t fill the room with harsh fumes, this delivers exactly that.

The quart comes with a pair of Omni Depot gloves, so you don’t need to buy hand protection separately when thinning oil-based paints, varnishes, or stains indoors. The low-odor formula keeps the workspace comfortable while the gloves protect your hands from chemical contact. That combination makes it a practical choice for small furniture refinishing, cabinetry touch-ups, and weekend DIY projects where safety and convenience matter more than raw volume.

The quart size means you have to weigh your needs. If you are prepping a whole room of trim or multiple coats on a large piece of furniture, you will need to buy more than one bottle. The Omni Depot bundle gives you a cleaner start for smaller jobs, but for bigger work you may prefer a gallon jug and buy gloves separately.

A full gallon of industrial-grade solvent means you can tackle heavy-duty degreasing, equipment cleaning, and large-scale paint thinning without running out mid-job. This product is designed for factories, repair shops, automotive facilities, and maintenance teams where consistent performance matters. The reduced-odor formulation improves workspace comfort compared to traditional mineral spirits, and the Made-in-USA manufacturing follows strict quality standards for reliable results. This is the gallon you grab when you need to dissolve grease, oil, dirt, wax, adhesives, and residues from tools and equipment, or thin oil-based paints, stains, varnishes, and coatings.

At 6.9 pounds for a full gallon, this solvent is built for serious workloads, not quick brush dips. If you only need a quart for occasional touch-ups, something like Sunnyside Pure Odorless Paint Thinner Quart is lighter and easier to handle. But for anyone running a workshop, maintaining machinery, or prepping surfaces for industrial coatings, the volume and strength here justify the commitment. Just remember that hazmat shipping rules make this a final sale, so plan your purchase accordingly.

This Speedball paint thinner comes in a 32-ounce bottle and is odorless, which means you can clean brushes and accessories without the harsh chemical smell that often lingers in a studio or workshop. The large volume gives you plenty of solvent for multiple sessions, making it well suited for artists or DIYers who go through cleaner quickly. Its primary design focus is brush cleaning, so if that is your main task, this bottle delivers exactly what you need without unnecessary additives or strong fumes.

This product is labeled combustible, so you must store it away from sparks, heat, and flame, a standard caution for any solvent but worth repeating. Compared to the Eco Safety SoyThin Odorless Paint Thinner, which also targets brush cleaning and comes in a quart, the Speedball offers a similar odorless experience in a slightly taller bottle. For someone who prioritizes a fume-free workspace and needs a dedicated brush cleaner rather than a multi-purpose thinner, this is a focused, no-nonsense option.

This solvent evaporates completely, leaving nothing behind in your paint layers, so there’s no risk of residue weakening the structure of your oil painting over time. It thins Gamblin mediums and oil paints without adding any smell, which makes it a good fit for shared studios or small spaces. The 4.2-ounce bottle is small enough to tuck into a pochade box or drawer, and the lack of odor helps you stay focused on your work.

The small bottle won’t last long if you’re cleaning brushes or thinning paint in large quantities. For bigger jobs, you could consider a quart-sized option like the Sunnyside Pure Odorless Paint Thinner. Gamsol is a petroleum distillate, so it’s not a plant-based solvent like the Eco Safety SoyThin. Still, if your priority is a solvent that leaves zero residue in the paint film, this one delivers on that promise.