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PARAFILM

PARAFILM is a brand of laboratory sealing film manufactured by Bemis Company, Inc., a US-based packaging and pressure-sensitive materials supplier with a history dating back to the 1850s. The product line consists of a proprietary blend of polyolefins and paraffin waxes, formed into a flexible, self-adhering sheet that does not require adhesive or heat to seal. PARAFILM is widely used in laboratory, industrial, and field settings where a temporary, moisture-resistant, and gas-permeable seal is needed for containers, beakers, flasks, and tubing. The material is non-toxic, non-sterile, and transparent, allowing visual inspection of contents without breaking the seal. It is available in multiple widths (2 in and 4 in) and lengths (125 ft and 250 ft), with a consistent thickness of 0.13 mm. The film stretches easily to conform to irregular shapes and maintains its seal under moderate pressure and temperature variations (typically up to 60°C). PARAFILM is not designed for high-pressure or high-temperature applications; it is intended for temporary sealing during storage, transport, or short-term experiments. 3G Electric supplies PARAFILM products globally, offering multiple SKUs with datasheets and logistics support. The film is compatible with standard laboratory glassware, plasticware, and metal fittings, and can be cut to size without tools. Its primary applications include sealing culture vessels, covering beakers during incubation, wrapping tubing connections, and protecting samples from dust or evaporation. The material is also used in field sampling kits and portable analytical equipment where a quick, reliable seal is required. PARAFILM is not autoclavable and should not be used with strong solvents or extreme pH conditions. It is a consumable item with a shelf life of approximately 3 years when stored in a cool, dry place away from direct sunlight. 3G Electric stocks PARAFILM in standard widths and lengths to meet routine laboratory and industrial sealing needs, with no minimum order quantities for most SKUs.

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About PARAFILM

PARAFILM is a brand of laboratory sealing film manufactured by Bemis Company, Inc., a US-based packaging and pressure-sensitive materials supplier with a history dating back to the 1850s. The product line consists of a proprietary blend of polyolefins and paraffin waxes, formed into a flexible, self-adhering sheet that does not require adhesive or heat to seal. PARAFILM is widely used in laboratory, industrial, and field settings where a temporary, moisture-resistant, and gas-permeable seal is needed for containers, beakers, flasks, and tubing. The material is non-toxic, non-sterile, and transparent, allowing visual inspection of contents without breaking the seal. It is available in multiple widths (2 in and 4 in) and lengths (125 ft and 250 ft), with a consistent thickness of 0.13 mm. The film stretches easily to conform to irregular shapes and maintains its seal under moderate pressure and temperature variations (typically up to 60°C). PARAFILM is not designed for high-pressure or high-temperature applications; it is intended for temporary sealing during storage, transport, or short-term experiments. 3G Electric supplies PARAFILM products globally, offering multiple SKUs with datasheets and logistics support. The film is compatible with standard laboratory glassware, plasticware, and metal fittings, and can be cut to size without tools. Its primary applications include sealing culture vessels, covering beakers during incubation, wrapping tubing connections, and protecting samples from dust or evaporation. The material is also used in field sampling kits and portable analytical equipment where a quick, reliable seal is required. PARAFILM is not autoclavable and should not be used with strong solvents or extreme pH conditions. It is a consumable item with a shelf life of approximately 3 years when stored in a cool, dry place away from direct sunlight. 3G Electric stocks PARAFILM in standard widths and lengths to meet routine laboratory and industrial sealing needs, with no minimum order quantities for most SKUs.

Common Applications

  • Laboratory research — Sealing culture flasks and beakers during incubation with PARAFILM (HS234526A)
  • Field sampling — Wrapping sample containers to prevent evaporation during transport using PARAFILM (HS234526B)
  • Industrial maintenance — Temporary sealing of tubing connections and fittings with PARAFILM (HS234526C)
  • Pharmaceutical production — Covering mixing vessels to reduce dust ingress with PARAFILM (HS234526A)
  • Environmental testing — Sealing water sample bottles for short-term storage with PARAFILM (HS234526B)
  • Educational labs — Protecting chemical reagents from moisture in storage containers using PARAFILM (HS234526C)

Frequently asked questions

Common questions about PARAFILM from 3G Electric.

What is PARAFILM made of and how does it seal without adhesive?

PARAFILM is composed of a blend of polyolefins and paraffin waxes. It seals through self-adhesion when stretched and pressed onto a surface. The material's elasticity and wax content create a temporary bond that conforms to irregular shapes without requiring heat or adhesive. The seal is moisture-resistant and gas-permeable, suitable for short-term applications.

What are the temperature limits for PARAFILM?

PARAFILM is rated for continuous use up to approximately 60°C (140°F). At higher temperatures, the film may soften, lose its seal integrity, or melt. It is not recommended for autoclaving or use in ovens. For applications above 60°C, alternative sealing methods should be considered.

Can PARAFILM be used with organic solvents or strong acids?

PARAFILM is not chemically resistant to organic solvents, strong acids, or bases. The polyolefin-wax blend can degrade or dissolve when exposed to such chemicals. It is best suited for aqueous solutions, mild buffers, and general laboratory reagents. Always test compatibility with your specific chemical before use.

Is PARAFILM sterile or autoclavable?

PARAFILM is supplied as non-sterile. It is not autoclavable because the material will melt or deform at typical autoclave temperatures (121°C). For sterile applications, the film can be surface-disinfected with 70% ethanol or isopropyl alcohol, but this does not guarantee sterility. Use sterile alternatives if required.

What sizes of PARAFILM does 3G Electric offer?

3G Electric stocks PARAFILM in 2-inch and 4-inch widths, with lengths of 125 ft and 250 ft per roll. All rolls have a thickness of 0.13 mm. The film is clear and non-sterile. Part numbers include HS234526A (2 in x 250 ft), HS234526B (4 in x 125 ft), and HS234526C (4 in x 250 ft).

How should PARAFILM be stored to maintain its properties?

Store PARAFILM in a cool, dry place away from direct sunlight and heat sources. Ideal storage temperature is between 15°C and 25°C. Avoid exposure to ozone, UV light, and strong chemical fumes. Under proper conditions, the shelf life is approximately 3 years from the date of manufacture.