In order to produce a coating with suitable properties, many additives are included in a coating formulation to achieve specific property modifications .
In this work , two kinds of flame retardant materials were used as additives to increase the combustion resistance , and to decrease the flame spread of oil paint , these are : soluble Sodium Silicate and Sodium Silicate powder with oil paint. Different weight percent ratios (2.5 , 5 , 7.5 , 8.5 , 10 , 12.5 ,15 ) % for the two additives were added to oil paint to obtain different samples. It was found that , good flame retardant , and distinct decreasing in flame spread ( flame speed ) , of oil paint was obtained , in all weight percent ratios for all the samples of the two additives . Self extinguishing was observed at the ratios (7.5 , 8.5 , 10 , 12.5 ) % for the two additives , and ( no burning ) for them , were observed at (15) % . The mechanical properties tests ( adhesion force , impact strength ) were carried out to painted samples with oil paint mixed with second additive for all the above ratios, after about month from its preparation , the samples complied with Iraqi standard specifications No. 960