FireFX Intumescent Basecoat is a water-based, white, thin film intumescent coating for the protection of internal structural steelwork. FireFX intumescent coatings provides up to 120 minutes fire resistance to āIā section beams, columns, hollow section columns and cellular beams. FireFX is able to offer coatings to suite all fire rating option from 30 minutes through to 120 minutes of fire resisitance.