Intumescent paints have been around for a long time. The good companies have UL certification(both U.S. and Canada), require factory trained applicators, and require Special Inspections under 2006 IBC and AWCI 12-B.
The brands I am most familiar with are ALBI and PPG, but, there are hundreds. It isn't a penetrant like typical fire retardant treatment, but, a surface coating that reacts to heat and expands to a noncombustible layer that will protect for 1 or 2 hours depending on brand, substrate, and thickness. The real problem in concealed, combustible spaces is proper and full application of all exposed areas. Prefinishing helps, but, thorough reinspection of in-place items is required. Especially dificult are pitched roof trusses. Also intumescent paint can be used on unlisted wood cabinets to make liquid storage cabinets for comubustible liquids in the IFC. My only 2 cents. Dan Kaczor Plan Examiner -- No virus found in this outgoing message. Checked by AVG. Version: 7.5.433 / Virus Database: 268.16.9/622 - Release Date: 1/10/07 2:52 PM _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum
