Abstract: A sealing apparatus (20) for engaging or sealing flexible material (22) comprises an elongated locking or roller member (30) and a channel-forming member or frame (40). The frame (40) has opposing cantilevered panels (42, 44) between which a channel (50) is formed, the cantilevered panels (42, 44) being resilient panels which accommodate insertion of the roller (30) into the channel (50) and withdrawal of at least a portion of the roller from the channel, whereby the flexible material (22) is engaged between the roller (30) and the frame (40) when the roller is inserted into the frame. The roller (30) is pivotally connected to the frame (40), and has a handle end (32) which protrudes past the frame (40) to facilitate withdrawal therefrom. An external surface of frame (40) has a recess which accommodates a magnet (80) fitted therein to facilitate attachment of the sealing apparatus to metallic surfaces.