Parafilm laboratory film is a versatile solution for securely sealing a variety of laboratory vessels such as beakers, Erlenmeyer flasks, weighing bottles, and graduated cylinders. Its highly elastic and stretchable nature allows it to snugly fit the openings of different vessels, providing a protective barrier against contamination and evaporation. Additionally, Parafilm is effective in preventing spills from fallen-over flasks.

Key Features:

  1. Elastic and Stretchable: Parafilm can stretch up to 200% of its original size, allowing it to adapt to various vessel shapes and sizes. This elasticity ensures a secure and tight seal.
  2. Versatile Application: Suitable for sealing a range of laboratory vessels, Parafilm offers flexibility in protecting specimens and maintaining their integrity.
  3. Contour Adherence: Its stretchable and clingy properties enable Parafilm to adhere to irregular shapes and surfaces, ensuring comprehensive coverage and protection.
  4. Prevention of Contamination: Parafilm serves as a protective barrier, safeguarding specimens from contamination and minimizing the risk of evaporation.
  5. Spill Prevention: In cases of fallen-over flasks, Parafilm acts as a spill-prevention measure, reducing the likelihood of spills and maintaining a clean working environment.
  6. Regulatory Compliance: When in contact with foods, Parafilm adheres to the regulations set by the US FDA (Food and Drug Administration) when used below 55°C. It also aligns with GMP (Good Manufacturing Practice) standards.

Parafilm’s adaptability, protective features, and regulatory compliance make it a reliable choice for laboratories seeking a versatile and effective sealing solution for various vessel types.


Physical PropertiesChemical Resistance
  • Toxicity: not toxic
  • Melting point: 60 °C
  • Flash point: 301 °C
  • Temperature range (continuous use): – 45 °C to + 50 °C
  • Stretchability: 200 %
  • Elongation at tear: 300 %
  • Gas permeability in 24 hours at 23 °C with 50 % relative humidity:
    • Oxygen O2 ≤ 350 cm3/m2
    • Nitrogen N2: ≤ 105 cm3/m2
    • Carbon Dioxide CO2: ≤ 1100 cm3/m2
  • Water vapour permeability in 24 hours at 37 °C and 90 % relative humidity: 0.8 g/m2
  • Storage: Parafilm® M can be stored for at least 3 years at a temperature between 7 °C and 32 °C and relative humidity of 50 %.
  • Parafilm® M is resistant up to 48 hours against many polar substances, e. g. saline solutions, inorganic acids and alkaline solutions. After that period it may become brittle.
  • Effects of 48 hours of exposure at 23 °C
  • Acids:
    • Hydrochloric acid 36.5 %: resistant
    • Sulphuric acid 98 %: resistant
    • Nitric acid 95 %: resistant*
  • Alkaline solutions:
    • Sodium hydroxide 22 %: resistant
    • Ammonia 28 %: resistant
  • Saline solutions:
    • Sodium chloride 20 %: resistant
    • Potassium permanganate 5 %: resistant*
    • Iodine solution 0.1 ml/l: resistant*
  • Organic solvents:
    • Methanol: resistant
    • Ethanol: resistant
    • Isopropanol: resistant
    • Diethylether: not resistant
    • Chloroform: not resistant
    • Carbon tetrachloride: not resistant
    • Benzene: not resistant
    • Toluene: not resistant

* Brown discoloration

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