Painted foam letters are manufactured from a Rigid polystyrene foam core laminated between two face veneers of resin-impregnated wood fiber. All foam letters receive two coats of primer (sealer) and three coats of paint, therefore making them durable for outdoor use. The foam is available in two sizes; half inch and one inch thick and can be painted any color. The letters are easily mounted with pressure sensitive adhesive (silicone). Not supplied. Just press in place.