Parafilm® M is a semi-transparent, flexible, thermoplastic film with a two-way stretch

• Creates a tight moisture barrier that holds a strong seal and doesn’t release from glassware, despite off-gassing
• 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
• Reduces 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 the original length
• Resistant for up to 48 hours against many polar substances such as saline solutions, inorganic acids, and alkaline solutions
• Two color options available in 2” 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