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Parafilm 50mm x 76M


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Features and Benefits:

  • The practical sealing film for all of your laboratory needs
  • Blend of waxes and polyolefins on a paper release liner
  • Highly insensitive to water, moisture loss and moisture absorption
  • Permeable to oxygen and carbon dioxide
  • Stretches more than 350% of its original length
  • Self sealing
  • Clings to irregular shapes and surfaces
  • Ideal for protecting the contents of test tubes, flasks, beakers and other vessels

Technical Data:

Elongation at Break>350%
Water Vapour Transmission Rate1g / (m2 d) @38c; 90%RH
Oxygen Transmission Rate300cm3 / (m2 d) @23c; 0%RH
Carbon Dioxide Transmission Rate1,200cm3 / (m2 d) @23c; 0%RH
Softening Point54c
Melting Point100c
ColourNatural (semi-clear)
ToxicityNon Toxic

Effects of Common Reagents

Parafilm M is resistant against many polar substances for up to 48 hours. After this period, some brittleness may occur. It is not recommended for use with chlorinated or non-polar aliphatic or aromatic solvents.

SolventConcentration24h Exposure 25 23c
Hydrochloric Acid12NNo apparent effect
Sulphuric Acid36NNo apparent effect
Nitric Acid16NResistant (some discoloration)
Sodium Hydroxide1.8NNo apparent effect
Ammonium Hydroxide14.5NNo apparent effect
No apparent effect
Ethanol95% (v/v)No apparent effect
Isopropanol99% (v/v)No apparent effect
Saline Solution20wt% NaClNo apparent effect
Potassium Permanganate5wt%Resistant (some discoloration)
Iodine Solution0.1NResistant (some discoloration)

Storage Conditions:

  • Temperatures of 7c to 32c and relative humidity of 35% to 55% are desirable.
  • Avoid extremes of heat and cold.
  • Store products in a cool, dry, clean environment, several inches off the floor.
  • Protect products from direct sunlight, heat, moisture, and keep in original container until ready for use.

Shelf Life:

Under the storage conditions stated above, Parafilm M is expected to have indefinite shelf life.


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