3M™ Windo-Weld™ 08611 Round Ribbon Sealer, 5/16 in x 15 ft Roll, Paste, Black3M Windo Weld Round Ribbon Sealer is designed as one roll of sealer with setting blocks. We constructed this ribbon sealer with a unique feature of controlled compressibility which allows for easy installation. This product will not squeeze out or allow light to contact pinchweld. This roll of sealer comes with a sufficient amount of material to replace one windshield or backlite. Features Controlled compressibility allows for easy installation Ribbon