Sealing machines are used to seal containers with liquids, granules, powders, and sprays for consumer, bulk, and original equipment manufacturer (OEM) supply shipments. Packaging materials include aerosol containers, bags and pouches, blister packs, bottles and jars, as well as cartons and boxes.Product description. Induction sealing, also known as "cap sealing", is a technique of airtight sealing a liner to the top of a plastic container by utilizing heat produced by an electromagnetic induction device. This method provides evidence of tampering or theft, prevents leaks, and preserves freshness!