Fire proof paint for steel workThe fire protection rate depends on the type of fireproofing you will use (intumescent or cementitious), the thickness of the paint, the design you will use (e.g. Underwriters Laboratories - UL Design) inclusive the supplier of the product, and the type of element you will protect, etc. You should contact different suppliers in order to find their charts and values. Some of those common suppliers are carboline, Isolatek. Now -a- days intumescent is very famous for architechtural building with expose condition. If your steel column is clad by some other material . you can go for cementitious because cementitious is less cost compare to intumecent.none of paints provide fireproofing for two hours. There are other materials that do - sprays (like Armotherm/Protec Flamme) and boards (like Knauf Fireboard), but not the paint.I'm telling this because I have investigated this issue with fire-design calculations according to EN 1993-1-2.find literature at www.carbonine.com, thermoguard W instrumescent, fireguard E-84 - shild industries,. The delay is passive for 1 hour, 2 hour and so on. Besides, is too expensive."Intumescent paint by "Jotun" is been used across Gulf Resion for fire proofing of Structural steel.for best results u can use PHOENIX INTUMESCENT PAINT / MONOKOTE VERMICULITE CEMENTIOUS SPRAY u can contact Mr.Carl D'costa on his mobile # 09650089816 or EMAIL : carl.dcosta@pfp-services.com ,See International Building Code 2009 Section 721.