SUB-SEAL™ J-tube Seals are used to seal the interface between the umbilical / flexible riser and the inside of a J-Tube, incorporating a water tight seal in which an anti corrosion inhibitor is often introduced, our J-tube seals offer both diverless and diver installed solutions. Manufactured from high marine grade Subthane™ Polyurethane and of split shell, modular construction, our J-tube seal solutions allow ease of installation. Typically the J-tube seal will be combined with a centraliser arrangement, designed to accurately position the cable within the J-tube seal during the pull-in process.