A 100% solids composition and method for priming or sealing a concrete surface wherein the 100% solids composition is formed of a tree rosin ester resin and a vegetable oil or vegetable oil-derived plasticizer, which are renewable or largely renewable, and wherein the 100% solids composition provides strong adhesion, can be applied by brushing or spraying at a temperature of less than 400° F. without adding a solvent or water thereto, produces substantially no VOCs, requires no time for curing or evaporation, and is ready for traffic or other normal use after cooling.