DOUBLE-SIDED SEAM TAPE 3 in. [PER FOOT] DOUBLE-SIDED SEAM TAPE 3 in. [PER FOOT] $0.75 SKU: LINBT3 QTY: Click here to save 5% off of your order! DOUBLE SIDED SEAMING TAPE 3in. Double sided extruded black rubber adhesive tape 3in. wide. Used to join two panels of EPDM liner. Provides a strong water tight seal. Sold by the foot (3in. x 1') UP TO 25'.