JTF‑Ⅳ is designed to prevent coal spontaneous combustion in goafs and abandoned roadways. Composed of Materials A and B, it forms an inorganic high-water gel with low viscosity. The gel penetrates well, seals leaks, and cools fire zones effectively.

JTF‑Ⅱ targets coal spontaneous combustion in roadways, support tops and air leakage at upper and lower corners. Materials A and B mixed at a 1:1 ratio form cured foam with over 10‑fold expansion without heat generation, avoiding the high heat release of traditional polyurethane fillers. With low initial viscosity, it penetrates well into broken coal and goafs, forming a dense structure with excellent sealing, heat absorption and cooling performance.