High Quality Content by WIKIPEDIA articles! Parafilm is a product of the Pechiney Plastic Packaging Company, based in Chicago, IL. It consists of a flexible film, available in several different lengths and widths. It is commonly used for sealing or protecting vessels (such as flasks or cuvettes). It is stretchable, moldable, waterproof, odorless, thermoplastic, semitransparent and self-adhering. It is also used to further seal a lidded container against moisture for long term storage.Since it is a thermoplastic, Parafilm is not safe for use in an autoclave. Parafilm also has gained a reputation among modelers as an ideal masking material for use during airbrushing, due to its lack of tackiness, which can destroy a finish.