J Tape Parking Sensor Masking Stickers x 20 Automotive Reverse Covers Parking Sensor Masking Discs are the ideal solution for the protection of parking sensors and rubber seals during the painting process. They alleviate the need to remove the bumper/fender, by protecting the sensor during sanding, painting and polishing.No more tricky masking; Parking Sensor Masking Discs are applied instantly and are removed simply with an easy lifting tab. Removed when the clearcoat is wet avoids bridging and rough edges.