An experimental computer design study was used to evaluate the effects of twenty commercially available chlorinated plasticizers on ultraviolet aging properties of a water-proofing sealer paint. The study successfully demonstrated that the concentrations under which paints are made do indeed affect the yellowing characteristics of paints. It also helped to rank the performance of the various plasticizers, as well as identify the optimal vehicle ratios of resin binder and plasticizer for each formulation, and establish the influence of paint mixing conditions. -- AATA