Pressure-sensitive adhesive (PSA) veneer is a paper-backed veneer that is a simple and easy alternative for applying veneer without needing a liquid adhesive. A PSA Backer is similar to a sticker and is the most user-friendly back that already has the adhesive applied. Suppose the idea of gluing and clamping up veneers sounds time-consuming or intimidating. In that case, you might want to use this alternative - Just make sure it is a smooth surface that is dry and free of dust and contaminants.