Parafilm® M is a efficient and cost-effective covering for test tubes, beakers, vials, petri dishes, flasks, and various other instruments. It is a versatile thermoplastic film that offers numerous benefits. With its semi-transparent and flexible nature, it can be easily stretched in two directions. This unique feature allows it to create a tight moisture-barrier that forms a strong seal and remains firmly attached to glassware, even in the presence of off-gassing. Moreover, Parafilm® M is a safe choice as it is non-toxic and free from plasticizers. Its composition primarily consists of polyolefins and paraffin waxes, providing excellent resistance against acids, alkalis, and some organic solvents. However, caution should be exercised when using it with acetone, diethyl ether, or tetrachloride.
Another advantage of Parafilm® M is that it reduces the risk of tampered data with a covering that is odorless, colorless and semi-transparent. Additionally, this film acts as a protective barrier by preventing moisture and volume loss. Its flexibility and self-sealing characteristics allow it to conform to irregular shapes and surfaces effectively. Notably, Parafilm® M can stretch over 200% of its original length, ensuring optimal coverage. Lastly, it exhibits impressive resistance for up to 48 hours against various polar substances, including saline solutions, inorganic acids, and alkaline solutions.