The tube seal consists of a liquid-filled tube, covered by a scuffband, and positioned directly on the stored product. The liquid inside the tube applies gentle pressure against the tank shell, eliminating the gap between the stored product and the seal.

A scuffband made of nylon fabric with an abrasion-resistant polymer coating is placed against the tank shell to prevent surface wear. The scuffband is bolted at both the top and bottom, with its lower portion in contact with the stored liquid (product-mounted). The liquid-filled tube exerts hydraulic pressure outward, pressing the scuffband firmly against the tank shell to create an effective seal.