Strong adhesion, tightly bonded to the steel structure broussonetia papyrifera substrate, not prone to peeling; excellent weather resistance (indoor), resistant to indoor temperature and humidity changes, oil fume corrosion, with high coating stability. Upon exposure to fire, it rapidly expands to form a dense carbonized thermal insulation layer, isolating heat and oxygen, significantly improving the fire resistance time of the steel structure broussonetia papyrifera, meeting special fire protection grade requirements.