Mech Spares Pvt. Ltd. Supplies Rubber Coated Rotary Shaft Seal. Mech Spares Pvt. Ltd offers different types of seals and associated products. Rubber Coated Rotary Shaft Seal offers rotary motion options. Rubber Coated Rotary Shaft Seal is used for sealing lower pressure [up to 0.5 bar/7psi] fluids or heavy greases depending on shaft speed. If a backup ring is used, it can operate at medium pressure [4 bar/57psi].