If you’ve ever worked in a lab, chances are you’ve used Parafilm laboratory film. It’s one of those simple but brilliant tools that makes day-to-day experiments safer and easier. Whether you need to seal a beaker, Erlenmeyer flask, weighing bottle, or graduated cylinder, Parafilm stretches and clings securely, protecting your samples from contamination, evaporation, or the occasional knock that sends a flask toppling.
What makes Parafilm so useful?
The secret is in its stretch. Parafilm can expand up to 200% of its original size, meaning it hugs vessels of all shapes and sizes—even the awkward ones. This flexibility means you don’t always need stoppers, lids, or caps, saving time and reducing waste. Plus, it’s transparent enough that you can still see your sample clearly underneath.
It’s not just for lab work, either. Parafilm can also be used around food, as long as it’s below 55 °C and local regulations are followed. In fact, it complies with US FDA standards and is produced in line with Good Manufacturing Practice (GMP).
Stand-out features of Parafilm
Here are some of the qualities that make Parafilm a lab essential:
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Safe to use: non-toxic and easy to handle
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Flexible in conditions: works continuously between –45 °C and +50 °C
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Durable: stretches 200% and elongates 300% before tearing
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Protective: resists oxygen, carbon dioxide, and water vapour, helping to keep samples stable
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Long-lasting: stores well for up to 3 years if kept between 7 °C and 32 °C at 50% humidity
Resistant where it counts
Parafilm also holds up against many chemicals for up to 48 hours, including common acids like hydrochloric and sulphuric acid, alkaline solutions like sodium hydroxide, and solvents like ethanol and methanol. However, it doesn’t mix well with certain organic solvents such as chloroform, benzene, or toluene.
Why it’s a lab staple
In short, Parafilm laboratory film is one of those quiet heroes of the lab. It’s stretchy, reliable, and protective—keeping your samples safe while making your work a little easier. From sealing culture tubes to preventing spills, it’s no wonder Parafilm has become a global favourite.
