It’s essential to mask the jambs on a vehicle before repairing it to prevent them from overspray. Colad Foam Masking Tape is designed to fill up the jambs and prevents them from overspray. And it provides a smooth edge since the adhesion line is placed ‘’inside’’ of the aperture. If you use regular masking tape for this it’s going to leave a hard edge, foam masking tape results in a soft edge.