It is used for hermetic connection of MINI and MEDI manifold wells with extension pot. The seal is made of polymer and is in the form of a strip wound into a roll, secured by paraffin paper preventing sticking together. Throughout its life-time, the polymer seal retains its consistency of plastic and sticky sealant agent with high adhesion to plastics, metals, ceramic, wood and painted surfaces. It is characterized by high chemical resistance to acids, bases, salts, detergents and all biological and chemical components. The seal is resistant to aging under the influence of atmospheric conditions such as UV radiation. It does not change physical and chemical properties of standard plastics as well as laminated and varnished coatings. The seal is disposable - it should be replaced when it is necessary to disassemble the well with extension.