Incorporation of LL fire retardant in fire proofing coatings is one of the ways to improve performance of fire proofing coatings, which is proved by test results in chamber combustion test, fume emission test, DSC, and electronic microscope. When the charging of LL fire retardant is 15% , the fire proofing coatings shows good fire proofing performance, as well as excellent chemical and physical properties.