Parafilm M® is a moisture-resistant thermoplastic used in research, clinical and industrial laboratories. This laboratory film can be utilized to prevent contamination, evaporation or spills.Perfect for seal from the smallest test to the Largest Wide Neck Vessel ! With the ability to stretch four times its own size !!!!! Parafilm M® is self-sealing, flexible, odorless, semi-transparent and can stretch and mold to irregular shaped surfaces providing a reliable barrier. Available in a range of sizes, Parafilm M® can be useful in electron microscopy droplet staining and thin-film grid coating. It can also provide a non-slip surface on trays and shelves for instruments or container9

Roll sizes and General Purposes 5cm x 76.2 meters (2" wide x 250' long) No. 807-6 For smaller applications, 2" squares can be cut quickly with the dispenser and used for test tubes, flasks, and covering irregular surfaces. In horticultural research, Parafilm M is used to seal grafts and cut stems to prevent moisture loss. 10cm x 38.1 meters (4" wide x 125' long) No. 807 Saves time when medium sized sheet or strips are needed for larger beakers, tubes, trays, containers and culture media.

Permeability Characteristics:

  • 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: same as flat
  • Note: Because of low water permeability and the insensitivity of this material to moisture vapor, it is unlikely that differences in relative humidity (RH) will make a difference in the oxygen permeability

Effects of Common Reagents:

  • Hydrochloric acid conc. (12N) dil. (5N) - no apparent effect in 24 hours
  • Sulfuric acid conc. (36N) dil. (5N) - no apparent effect in 24 hours
  • Nitric acid conc. (16N) dil. (5N) - no apparent effect in 24 hours
  • Sodium hydroxide conc. (22%) - no apparent effect in 24 hours
  • Ammonium hydroxide conc. (28% NH3) - no apparent effect in 24 hours
  • Potassium permanganate: 5%: no apparent effect except permanent dark brown coloration in 18 hours 0.1%: same as 5% but slightly less color Iodine solution 0.1N: no effect except brown staining in 18 hours
  • Salt (NACL) solution 20%: no apparent effect in 24 hours
  • Ethyl Alcohol 95%: no apparent effect except some face whitening in 24 hours
  • Isopropyl alcohol 99%: no apparent effect in 24 hours
  • Not recommended for use with chlorinated, non-polar aliphatic and aromatic solvents
  • Film becomes soft and sticky at about 130°F to 150°F (54°C to 66°C)

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