A one pack aqueous insecticidal architectural coating composition comprising an aqueous dispersion of polymer particles as binder and further comprising, based on the total liquid paint formulation,i) from 0.1 to 4.0wt% insecticideii) from 0.5 to 6.5wt% dibasic ester solventwherein the insecticide is located in the polymer particles and the polymer particles are film forming at ambient temperatures.