Rubber seals are metal cladded to reduce frictional force. These seals are less flexible than rubber seals. These seals are less effective to cover the deficiencies caused by misalignment in the embedded metal of the gate or variations in the gate fabrication. To overcome the drawback of reduced flexibility of fully cladded seals and to cover some degree of misalignment of either the gate or embedded parts, cladding may be provided on portion of the seal.