Low‑VOC Eco‑Friendly Water‑based Intumescent Fire‑Retardant Coating for Steel Structure WFS‑101 Introduction: WFS‑101 Low‑VOC Eco‑Friendly Water‑based Intumescent Fire‑Retardant Coating for Steel Structure is oriented to enclosed and semi‑closed spaces with strict air‑quality requirements. It adopts low‑VOC acrylic binder and halogen‑free intumescent fire‑retardant raw materials, only clean water is allowed for dilution. Minimal irritant volatile substances will be released