Moisture-proof film molds to surface. Parafilm® M is a semi-transparent, flexible, thermoplastic film with two-way stretch. Non-toxic and free from plasticizers, primarily composed of polyolefins and paraffin waxes offering good resistance against acids, alkalis and some organic solvents-use not recommended with acetone, diethyl ether or tetrachloride†

• Protect the integrity of research applications with a tight moisture-barrier that holds a strong seal and doesnt release from glassware, despite off-gassing
• Reduce the risk of tampered data with a covering that is odorless, colorless and semi-transparent
• Prevents moisture and volume loss due to material composition and tight seal
• Flexible and self-sealing material allows it to cling around irregular shapes and surfaces
• Stretches more than 200% of original length
• Resistant up to 48 hours against many polar substances such as saline solutions, inorganic acids and alkaline solutions
• Two color options available in 2 in. rolls (natural and purple) for color coding purposes

Permeability:
• Oxygen: (ASTM 1927-98) 150 cc/m² d at 23°C and 50% RH
• Carbon Dioxide: (Modulated IR Method) 1200 cc/m² d at 23°C and 0% RH
• Water Vapor: (ASTM F1249-01): Flat: 1 g/m² d at 38°C and 90% RH; Creased: 1 g/m² d at 38°C and 90% RH

†Not recommended for use with chlorinated, non-polar aliphatic and aromatic solvents
††Film becomes soft and sticky at about 130°F to 150°F (68°C)
†††Parafilm® is a registered trademark of Bemis Company, Inc.
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