“Zero VOC” is not the whole answer: 7 checks before buying interior paint

Interior paint is at once a surface finish, a chemical mixture and a design decision that may remain in the room for years. A colour name or the words “water based” do not by themselves reveal how much product you need, which precautions apply or what an environmental claim actually verifies.

Commission Decision (EU) 2025/2607 sets updated EU Ecolabel criteria for decorative paints, varnishes and related coatings. The scheme does not look at one ingredient alone: it includes performance requirements, limits for VOCs and SVOCs, and restrictions on hazardous substances. The label and instructions for the specific product still come first.

1. Is it made for interior use?

Do not use façade paint or another exterior coating on an indoor wall simply because the colour works or some is left over. Interior and exterior products may use different additive systems and conditions of use. Check the exact purpose: wall, ceiling, wood, metal, radiator and wet room are different jobs.

2. What exactly does the VOC figure mean?

VOC is a collective term for volatile organic compounds. A lower figure can be a useful comparison, but “low VOC” or “zero VOC” is not a complete risk assessment. Individual compounds differ, and tint, primer and other layers form part of the system. Compare products intended for the same use and expressed in the same units, and ask whether the stated value also applies to the selected tinted colour.

3. Is it a genuine EU Ecolabel?

The EU Ecolabel is the stylised flower logo accompanied by a verifiable licence number. It is not the same as a green leaf, a brand’s own “eco” mark or a general sustainability claim. The paint criteria cover performance as well as environmental aspects. The label does not mean “chemical free”, and it never replaces the directions for use.

4. What do the pictograms and UFI say?

If a mixture is classified for a health or physical hazard, its packaging may carry CLP hazard pictograms, a signal word, hazard statements and precautionary statements. A price sticker or tinting label should not hide them. The UFI is a 16-character identifier linking a hazardous mixture to composition information submitted for poison-centre response. Its absence alone does not prove non-compliance: not every paint is classified as hazardous.

5. How much do you really need?

Do not look only at litres in the tub. Calculate the area, subtract large openings, then apply the manufacturer’s coverage and the required number of coats. A highly absorbent, repaired surface or a change from dark to light may need more. A compatible primer can even out absorption. A small, labelled quantity from the same batch is more useful for later touch-ups than several large opened leftovers.

6. Will it cope with the room?

A living room, child’s room, hallway and kitchen face different wear. Check washability, scrub resistance, sheen and the recommended substrate. A more durable coating may postpone repainting, but “washable” does not mean unlimited scrubbing. View a sample under artificial light as well as daylight: sheen and illumination change how a colour appears.

7. What is the ventilation and re-entry plan?

Provide genuine air exchange during and after painting, and follow label instructions for drying, recoating and occupancy. Air conditioning does not necessarily replace indoor air with outdoor air. Do not sleep in a freshly painted closed room merely because the surface feels dry. Seek individual medical advice where children, pregnant people, older residents, asthma or other sensitivities are involved.

A quick buying list

Bring the surface dimensions and material, the room’s use, the desired sheen and whether a primer is required. Photograph the full label, batch number and colour code. When buying online, find the hazard information and technical data sheet before ordering. A sound choice begins with verifiable information, not with the greenest-sounding word.