Zero‑VOC often refers to base paint only, excluding colorants that can raise emissions significantly. Ask for third‑party certificates, the exact method used, and measured values, not marketing categories. Clarify whether limits align with strict programs like GREENGUARD Gold. Confirm drying conditions, cure times, and guidance for sensitive occupants. True transparency includes full system disclosure and acknowledges how application technique, ventilation, and substrate interactions influence real indoor air outcomes beyond a simple label claim.
A product may smell mild yet still emit chemicals of concern at low levels over long periods. Request emission chamber reports for aldehydes, VOCs, and semi‑volatiles. Review sampling duration, detection limits, and compliance thresholds. Ask whether adhesives, sealants, and underlayments were included. Understand that scent masking can hide issues temporarily. Reliable brands share limits, methods, and comparative data, enabling you to prioritize choices that protect vulnerable occupants while maintaining design intent and everyday usability.