the invention is a device for providing a clamping force about a connection end of elastomeric hose and tubing . the device includes a heat shrinkable polymer , having a diameter reducing release temperature , formed into a band . the band has a first nominal inside diameter defined as the diameter the band assumes upon being shrunk in free space and being smaller than the outside diameter of the connection end of the elastomeric hose and tubing . the band has a second nominal inside diameter defined as the diameter the band assumes upon being shrunk about the connection end of the elastomeric hose and tubing . the band also has a third nominal inside diameter defined as the diameter of the band after polymer orientation and before shrinkage , the third diameter being greater than the outside diameter of the connection end of the elastomeric hose and tubing . the first inside diameter is no greater than about 80 percent of the third inside diameter .