How HPMC Prevents Sedimentation in Intumescent Coatings: Rheology Control & Suspension Stability Explained Introduction Water-based intumescent coatings are widely used for passive fire protection in steel structures, tunnels, industrial facilities, and commercial buildings. These coatings rely heavily on flame-retardant fillers such as ammonium polyphosphate (APP), aluminum hydroxide (ATH), magnesium hydroxide, and expandable graphite. However, one […]