$43.00 - $118.00
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Protect the integrity of your laboratory and research applications

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

  • Creates 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 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” rolls (natural and purple) for color coding purposes
  • 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
Effects of Common Reagents

Potassium Permanganate

  • 5%: No apparent effect except permanent dark brown coloration in 18 hours
  • 0.1%: Same as 5% except slightly less color
Iodine solution (0.1N)
  • No effect except staining brown in 18 hours
Ethyl Alcohol (95%)
  • No apparent effect except some face whitening in 24 hours
No apparent effect in 24 hours:
  • Hydrochloric Acid conc. (12N)dil. (5n)
  • Sulphuric Acid conc. (36n) dil. (5n)
  • Nitric Acid conc. (16n) dil. (5n)
  • Sodium Hydroxide conc. (22%)
  • Ammonium Hydroxide conc. (28% NH3)
  • Salt (NACL) solution (20%)
  • Isopropyl Alcohol (99%)
  • 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.