3M Bumpon Protective Products Molded Shapes - Colored and Clear Series are pressure-sensitive, adhesive backed polyurethane products. They can be used as feet, stops, spacers and protectors in many applications. The urethane is a durable, resilient elastomer. The aggressive, high tack, pressure sensitive adhesive is protected with a release liner making application fast and easy. 3M Bumpon protective product SJ5303 is a self-adhesive rubber bumper designed to be used as feet, stops and spacers. The hemispherical shape provides excellent sound damping and energy absorption.