Low-VOC and Water-Based Coatings Gaining Ground in 2026
Ask a few painters and decorators what has changed in their trade, and many will mention the same thing: the tin in the van is more likely to say “water-based” than it used to. Low-VOC coatings have moved from niche products to a mainstream choice, driven by regulation, customer expectations and better technology. This article explains what low VOC coatings are, why interest keeps growing, how they behave when sprayed and where caution is still sensible.
We avoid quoting statistics or specific legal limits, because they change and differ between product types. Where specifics matter, check current regulations and the product’s technical data sheet.
What does VOC mean?
VOC stands for volatile organic compounds: carbon-based chemicals that evaporate easily at room temperature. Many traditional paints and coatings use solvents that are VOCs. As the paint dries, these evaporate into the air.
Why that matters:
- Air quality. VOCs can contribute to the formation of ground-level ozone and smog outdoors.
- Indoor air. Some VOCs can irritate eyes, nose and throat, or cause headaches, particularly in enclosed spaces.
- Smell. Strong solvent odour is often a sign of high VOC content.
- Fire risk. Many solvents are flammable.
Not all VOCs are equally harmful, and “low VOC” does not mean “no hazard”. It means the product contains less of these compounds than conventional alternatives, according to a defined measure.
What are water-based coatings?
Water-based (waterborne) coatings use water as the main carrier instead of organic solvent. The resin is dispersed or dissolved in water, and as the coating dries, water evaporates and the resin particles coalesce into a film. They may still contain small amounts of co-solvents to help film formation, which is why low-VOC and water-based are related but not identical terms.
Other low-VOC approaches include:
- High-solids coatings, which contain more resin and less solvent.
- Powder coatings, which are applied dry. See our comparison of powder coating and wet spray.
- Radiation-curable coatings, cured by light and used in specialised industries.
- Solvent-free two-pack systems, such as some epoxies.
Why interest is growing
Several forces push in the same direction:
- Regulation. Rules limiting VOC content in various product categories have tightened over the years.
- Customer demand. Clients, schools, healthcare and hospitality settings often prefer lower odour products that can be used in occupied buildings.
- Health and safety. Reducing solvent exposure can make working conditions more comfortable, although it does not remove the need for precautions.
- Corporate sustainability goals. Larger buyers increasingly set targets around emissions and materials.
- Improved technology. Formulations have advanced considerably, narrowing the performance gap in many applications.
- Faster return to service. Some water-based systems dry and recoat quickly, which suits tight schedules.
How they perform: the honest picture
Where they do well
- Interior decoration. Walls, ceilings, joinery and furniture are now commonly coated with water-based systems.
- Low odour. A big advantage for occupied homes, offices and classrooms.
- Easy cleanup. Equipment often cleans with water, which means fewer solvents to handle and dispose of.
- Flexibility and colour retention. Many acrylic-based products resist yellowing better than some traditional oil-based paints.
- Reduced fire risk. Generally less flammable than solvent-based products, though always check the SDS.
Where they may need more care
- Drying depends on conditions. Cold, damp or humid air can slow drying considerably, and in extreme cases cause poor film formation.
- Adhesion to difficult surfaces. Some glossy, oily or previously oil-painted surfaces need thorough preparation and a compatible primer.
- Corrosion protection. For steel in harsh environments, long-established solvent-borne systems have a long track record. Water-based anti-corrosion systems have improved, but selection and preparation are critical.
- Grain raising on timber. Water can lift wood fibres, so sanding between coats is common.
- Flash rust on bare metal. Water in the coating can cause rust to form if the product is not formulated to handle it.
- Gloss and levelling. Modern products can achieve excellent finishes, but technique and product choice matter.
Spraying low-VOC and water-based coatings
Many water-based paints are designed to be sprayed, and the benefits include less odour and easier cleanup. However, some practical differences are worth knowing.
- Viscosity and thinning. Follow the maker’s advice. Some products need little thinning for airless spraying; others need adjustment for HVLP. Use the recommended thinner, which is often water, not the wrong additive.
- Equipment. Use equipment that is compatible with water-based materials. Some components that suit solvents may corrode when exposed to water over time, so clean and maintain them carefully. Our comparison of HVLP and airless sprayers helps with equipment choice.
- Drying and flash-off. Allow more time in cool or humid conditions. Consider gentle warmth and airflow, without kicking up dust.
- Film build. Avoid applying too heavily, which can cause sagging or slow drying. The advice in our runs and orange peel guide applies equally here.
- Surface preparation. Clean, key and prime properly. Water-based coatings can be less forgiving of contamination.
- Cleaning. Flush equipment promptly. Dried water-based paint can be hard to remove.
- Temperature. Keep to the temperature range on the data sheet for application and curing.
Safety is still necessary
Lower VOC does not mean no precautions.
- Water-based sprays still create airborne mist. Wear a suitable respirator, eye protection and gloves. Check the SDS for specific advice.
- Ensure good ventilation.
- Be aware that some products contain biocides, co-solvents or other substances that can irritate or sensitise.
- Handle and dispose of waste responsibly.
Read our spray painting safety and ventilation FAQ for the essentials.
Reading the label and claims
Marketing terms such as “eco-friendly”, “green” or “non-toxic” are not precise. To compare products:
- Check the VOC content on the data sheet, usually expressed in grams per litre, and see how it compares to the legal limit for the product category.
- Look for independent certifications or labels relevant to the product’s use, but understand what each actually covers.
- Read the SDS for hazard information.
- Check performance data: durability, adhesion, abrasion, weathering and corrosion resistance where relevant.
- Ask about suitable substrates and primers.
- Look at application guidance: temperatures, drying and recoat times, recommended equipment.
When to consider switching
Low-VOC or water-based coatings may suit you if:
- You work in occupied buildings and need low odour.
- You want easier cleanup.
- Local rules or client requirements push you that way.
- Your work is mainly interior decoration or light-duty finishing.
- You want to reduce flammable solvent storage.
Be more cautious, or take specialist advice, if:
- You coat steel in aggressive environments.
- You need specific certifications or standards.
- You work in cold, damp conditions with limited control.
- The substrate is difficult, such as oily, glossy or previously solvent-coated surfaces.
Frequently asked questions
Are water-based paints as durable as solvent-based ones?
In many applications, modern water-based products perform very well. In demanding environments such as heavy industrial or marine use, performance depends on the specific system. Check the data sheet and ask for evidence.
Do low-VOC paints have no smell?
They usually have much less odour, but some smell remains. Ventilation is still important.
Can I spray water-based paint with any sprayer?
Many sprayers can handle it, but check compatibility and cleaning requirements in the manual.
In summary
Low-VOC and water-based coatings have gained ground thanks to regulation, customer demand and better technology. They offer lower odour, easier cleanup and often reduced fire risk, but they need the right conditions, preparation and application. Check data sheets, test before committing and keep safety precautions in place. For a broader view of coating families, read our protective coatings overview.