PR1MA™ Extra Stretch Sealing Film

Flexible, airtight laboratory seal.

PR1MA™ Extra Stretch Sealing Film is a colorless paraffin/polyolefin film that molds to almost any surface, creating a secure seal for a wide range of laboratory containers. It adheres to test tubes, centrifuge tubes, petri dishes, flasks, bottles, and beakers, making it an essential tool for protecting sensitive samples.

This latex-free sealing film provides a strong yet flexible moisture barrier while allowing controlled exchange of H2O vapor, O2, and CO2, ensuring sample integrity without compromising off-gassing. Its unique formulation makes it stretchable, moldable, and self-sealing, sticking to itself or nearly any material. Ideal for use at low temperatures (including LN2 applications) and at higher temperatures, it forms an extraordinarily liquid-tight, airtight seal for dishes, tubes, glassware, and plasticware.

Whether you're preserving sensitive biological samples or securing vessels for transport or storage, PR1MA™ Stretch is the go-to sealing solution trusted by scientists across research, pharmaceutical, academic, and industrial laboratories.

Main Attributes

• Multi-surface adaptability – Seals securely to glass, plastic, and metal surfaces
• High stretchability – Stretches up to 350% for a snug, custom fit
• Self-sealing – Sticks to itself and forms a tight wrap around irregular surfaces
• Liquid-tight barrier – Ideal as an overwrap for caps, lids, and stoppers
• Flexible and translucent – Allows for easy visual inspection of contents
• RNase & DNase free – Safe for molecular biology applications
• Latex-free – Suitable for sensitive lab environments
• Cold and heat resistant – Maintains performance in a wide range of temperatures

PR1MA™ Extra Stretch Sealing Film also comes in sterile sheets.

When sterility matters, choose PR1MA™ Extra Stretch Sealing Film Sterile Sheets. Pre-cut in 2 x 4 In. and 4 x 4 In. sheets, these sterile seals are perfect for petri dishes, flasks, plates, and other containers. Packaged in resealable bags of 100 ready-to-use sheets, they eliminate the need for measuring or cutting.

EZcap™FoilStrips

EZcap™ PCR FilmStrips 

Parafilm® M Sealing Film

Flexible, stretchable lab film for moisture-resistant sealing.

Parafilm® M Sealing Film is a trusted solution for sealing and protecting labware, widely used in scientific, medical, and industrial settings. This semi-transparent, thermoplastic film is made from a blend of polyolefins and waxes, offering two-way stretch and excellent sealing capabilities on various surfaces, including test tubes, flasks, beakers, and petri dishes.

With the ability to stretch over 200% of its original size, Parafilm® M conforms tightly to irregular surfaces and forms a strong, moisture-resistant barrier that prevents evaporation and contamination. It is odorless, non-toxic, and resistant to acids, alkalis, and organic solvents, making it ideal for sensitive applications.

Available in various sizes, Parafilm® M is an essential lab consumable for preserving sample integrity and minimizing environmental exposure.

Key Features

• Forms a tight, moisture-resistant seal that adheres to glass, plastic, and metal
• Highly stretchable, extends over 200% to fit irregular shapes
• Resists acids, alkalis, saline solutions, and organic solvents for up to 48 hours
• Non-toxic, odorless, and semi-transparent for safe and easy use
• Self-sealing properties eliminate the need for adhesives or tapes
• Prevents moisture loss and sample evaporation

Ideal for lab, industrial, and research applications.

Specifications
 

Item #	Film Width	Roll Length	Color	Stretchability	Waterproof	Non-Toxic	Odorless
HS234526A	2 In.	250 Ft.	Natural	200%	Yes	Yes	Yes
HS234526C	4 In.	250 Ft.	Natural	200%	Yes	Yes	Yes
HS234526B	4 In.	125 Ft.	Natural	200%	Yes	Yes	Yes

 

DuraSeal™ Sealing Film

• Durable, heat-resistant, solvent-proof laboratory sealing film
• Chemically resistant
• Heat resistant & Microwave compatible
• Tight sealing
• Tear resistant

DuraSeal™ is easy to use. There is no inter-leaf paper to strip away, just stretch the film symmetrically over a container opening and the 1.5 mil thick film contracts inwardly around the opening or neck of the container to provide a drum-tight, water-proof seal. The film can be elongated 500-800% before breakage. The film clings to itself, especially after stretching so the free edges of the film may be stretched around the container to secure the container edges.

Permeability Information

• Oxygen = 125cc/100in2/24hrs at 23°C
• Carbon Dioxide = 1300cc/100in2/24hrs at 23°C
• Water Vapor = 1.0g/100in2/24hrs at 38°C and 90% R.H.

ContainerSeal™ Sealing Tape

ContainerSeal™ is a sealing tape designed for the vast range of bottles and containers used in laboratory applications. Its unique elastomeric characteristics allow it to stretch and conform around the irregular perimeters of containers lids and covers to form a tight seal. ContainerSeal™ will block water vapor loss, reduce the rate of gas exchange and prevent the entry of contaminants and can be easily removed from most surfaces without leaving adhesive residue.

Proudly made in the USA! Click here for more made in America products!

FilmStrips™

For Sealing Only One 8-well Row of a 96-well Plate.

PetriSeal™ Sealing Film

PetriSeal™ stretches and conforms to form a tight seal and is temperature resistant, waterproof and chemically resistant. It resists abrasion and puncture and blocks vapor loss while reducing the rate of gas exchange. Use PetriSeal™ with microtiter plates, Petri dishes and culture plates to prevent to entry of contaminants. The seal remains flexible down to -30°C and can withstand continuous exposure from -40°C to +77°C (with intermittent exposure up to 100°C). Tests have shown that PetriSeal™ leaves no adhesive residue even after two years.

Colors: Blue, Clear, Red, White & Yellow

Tape Size: 0.50 In. x 108 Ft.   
 

Proudly made in the USA! Click here for more made in America products!

Check Out the New & Improved DuraSeal - Click Here

DuraSeal Cling is a heat-resistant, solvent-proof laboratory stretch film that can be used on a wide range of vessels.

·       IT CLINGS- Film can cling to itself and glass vessels.

·       HEAT RESISTANT- Softens at 100°C

·       STRONG-Film can stretch 300-400 % before breaking or tearing

·       TIGHT SEALING-Forms an air-tight barrier when stretched across openings

·       VERSATILE-Compatible in more applications than Parafilm

·       TWICE AS LONG-Twice as long as Parafilm rolls

Comparison to Parafilm