PEI Fibertek Res-I-Straint assures your glass band of being the strongest, most secure and most accurate possible. Res-I-Straint tadpole edging tape is a nominal 5% resin impregnated and B staged edging tape used in conjunction with glass banding tape to provide a more uniform glass band. Hence, the diameter of the bead is proportionate to the thickness of the band. - It can also be used as a means of band stress relief when banding a wide area by using a third or intermediate restraint in the center of the glass band. Res-I-Straint is placed upon the armature prior to the banding tape application and the sewn-in bead forms the outer edges of the glass band.