For how long must substrate temperatures be maintained after applying TFIFRM?

The correct requirement for maintaining substrate temperatures after applying TFIFRM (Thermal Insulation and Fire Resistance Material) is typically set at 72 hours. This period is crucial because it ensures that the material fully adheres to the substrate and cures properly. Maintaining the right temperature promotes optimal bonding and performance of the fireproofing product, ultimately enhancing its effectiveness in providing structural integrity during a fire event. This timeframe allows any solvents or moisture to evaporate adequately, ensuring that the protective qualities of the fireproofing material are fully established.

Adhering to this 72-hour guideline is essential for achieving the intended fire resistance and insulation properties, which are vital for safety and code compliance in construction and renovation projects. Other durations like 24, 48, or 96 hours may not provide the necessary conditions for proper curing and performance of the fireproofing system.