Low‑Odour Indoor Water‑based Intumescent Fire‑Retardant Coating for Steel Structure WFS‑101 Introduction: WFS‑101 Low‑Odour Indoor Water‑based Intumescent Fire‑Retardant Coating for Steel Structure is specially optimized for occupied indoor building environments. It adopts low‑odour acrylic binder and halogen‑free intumescent components, allowing viscosity adjustment purely by clean water. During fire hazard, the coating undergoes chemical foaming reaction to produce thick