soils and filling the voids between the soil particles. this creates a barrier that effectively stops further seepage through the soil, and decreases the permeability of soil by several orders of magnitude. bentonite can withstand desiccation, hydration and freeze-thaw cycling without losing its sealing...
tape is made of a coated adhesive, which is backed by a non-sticky materials like paper, foil, fabric, or movie. there are several different grades & types of packaging tape products to suit varying packing demands. polyethylene plastic tapes or poly tapes, most commonly used for packaging and for sealing...
by officers: till mandatory self-sealing is operationalized, sealing of containers, wherever required to be carried out under the supervision of the officer, shall be done under the supervision of the central excise officer having jurisdiction over the place of business where the sealing is required...