This colorless, moisture-proof film molds to surfaces. Parafilm^® M* is a semitransparent, flexible, thermoplastic film with two-way stretch. Nontoxic and free from plasticizers, it is primarily composed of polyolefins and paraffin waxes. It offers good resistance against acids, alkalis, and some organic solvents. Use is not recommended with acetone, diethyl ether, or tetrachloride. Will stretch 200% and adhere to irregular shapes and surfaces to provide a secure seal. Disposable rolls.