Home / Lab Essentials / Sealing Film & Aluminium Foil
Lab Essentials
Sealing Film & Aluminium Foil
Photo coming soon sealing-film-foil.jpg
Lab Essentials

Sealing Film & Aluminium Foil

Stretch-to-Seal Film · Anti-Evaporation · Foil Light Shield · Lab Staple

Sealing film and aluminium foil are among the most used sealing and wrapping consumables in the lab. The elastic film stretches to seal bottle, tube and dish rims against evaporation, contamination and spillage, while foil wraps for light protection, covers vessels and insulates across a wide temperature range.

Elastic sealing film roll / Pre-cut film squares …Type
100 – 300 mmWidth
0.01 – 100 mLength / thickness
-20 ~ 60°C / Heat resistantTemperature

Specifications are subject to confirmation with your enquiry.

Request a Quote
Stretch Film Anti-Evaporation Foil Light Shield Low Temp Leak Resistant

📐 Highlights:
Stretch film seals many diameters · anti-evaporation · low-temp and acid resistant · foil blocks light and heat · easy to use

  • Film — Elastic, stretches to fit many diameters
  • Seal — Anti-evaporation, anti-contamination, leak resistant
  • Resistance — Low temperature, acids and alkalis, short-term to about 60°C
  • Foil — Light shielding, covering, insulation
  • Formats — Film roll, foil roll, pre-cut squares
  • Use — Sample storage, shaking culture, digestion prep
We will follow up on your inquiry as soon as possible. Custom sizes supported Samples available
Specifications

Specifications

Specifications below are the standard production range for sealing film and foil. Sizes are given as a selection hint only; please check the actual product.

Request custom specs

Sealing film and foil specifications

TypeWidth (mm)Length / thicknessTemperatureMain use
Elastic sealing film roll10030 ~ 38 m-20 ~ 60°CSealing, anti-evaporation
Pre-cut film squares100 × 100100 sheets/pack-20 ~ 60°CDishes, small vessels
Aluminium foil roll3000.01 ~ 0.02 mm thickHeat resistantLight shielding, covering
Pre-cut foil squares120 × 120100 sheets/packHeat resistantWeighing, covering
Values are typical; reasonable tolerances apply between production batches. Please rely on actual measurement.
📌 Customization:
• Film width selected to the vessel
• Pre-cut squares or full rolls available
• Foil thickness and width selected to order

Product Description

1. Overview

Sealing film is a stretchable membrane made from an elastic material. Once stretched it clings tightly to bottles, tubes, dishes and beakers to form a temporary seal that limits evaporation, contamination and spillage where venting is not required.

Most sealing film is a translucent elastic membrane, so the sample can be checked without opening it. It performs well at low temperature for freezer storage and resists common acids and alkalis. Foil is chosen instead for light shielding and heat, wrapping light-sensitive samples, covering vessel mouths and providing temporary insulation.

Selection comes down to vessel diameter, whether light must be blocked, and whether venting is needed. Shaking culture, water baths and freezer storage favour elastic film; light-sensitive and hot work favours foil. The two can be layered — film first, then foil — for a tighter seal and better shielding.

🔬 Types & Features:
Elastic fit — stretches to many diameters with no cutting.
Anti-evaporation — reduces sample loss and concentration change.
Low temperature — stays flexible in the freezer.
Foil light shield — wraps light-sensitive samples and insulates.

2. Key Parameters

  • Film material: elastic polymer film
  • Film temperature: low temperature to about 60°C
  • Roll size: about 100 mm wide, 30 to 38 m long
  • Foil thickness: about 0.01 to 0.02 mm
  • Foil temperature: tolerates normal oven temperatures
  • Use: sealing, light shielding, covering, insulation

3. Material & Workmanship

The film is an elastic polymer with good elongation that seals as it stretches; the foil is pure rolled aluminium, clean and easy to fold and wrap. Neither readily migrates plasticiser into routine samples.

Handling tip: wipe the rim before sealing, stretch the film and press the edge down; for light protection or heat, add a layer of foil over the film.

Applications

Typical Uses

Sample storage

sealing bottles against evaporation and contamination

Shaking culture

temporary covers for tubes and flasks

Freezer storage

stays flexible at low temperature

Light shielding

wrapping light-sensitive reagents and samples

Weighing

foil covers for weighing vessels

Industries

  • Chemical labs sealing reagents and samples
  • Biology labs covering culture vessels
  • Food testing sample prep and storage
  • Environmental monitoring storing water samples in the dark
  • Pharma QC storing samples and standards

Selection Guide

Choosing by application

ApplicationTypeNote
Shaking cultureElastic sealing filmStays put, resists spills
Freezer storageElastic sealing filmDoes not crack when cold
Light-sensitive samplesAluminium foilBlocks light
Digestion prepFoil coverHeat resistant, splash control
WeighingFoil squaresClean and easy to fold

💡 Tips: Wipe then seal — a clean rim seals far more reliably.
Stretch and press — stretch the film and press the edge down with no bubbles.
Add foil for light — wrap foil over the film when light must be blocked.
Match the width — the film must cover the whole mouth.

Operation & Maintenance

Operation Guide

How well a seal holds depends on a clean rim and good stretching technique. Typical steps follow.

03

Before Use

  • Wipe the rim to remove water and residue
  • Choose film width to suit the vessel mouth
  • Prepare foil as well if light must be blocked
  • Check the rim for cracks or chips
  • Have scissors or a film cutter ready
04

Procedure

  1. Tear a length of film that covers the mouth with an edge to spare
  2. Stretch the film with both hands until it thins and becomes elastic
  3. Lay it down from one side of the mouth and smooth it across
  4. Press the film down around the rim to drive out air bubbles
  5. Add a layer of foil over the film if light must be blocked
  6. Check that the film is stuck all round and top up if needed
  7. Peel back a corner to open rather than removing the whole sheet
05

Cleaning & Care

  • Remove the film and foil after use; do not reuse
  • Wipe residual adhesive with warm water or ethanol
  • Recycle foil and dispose of film as general waste
  • Clear adhesive from the rim so the next seal holds
  • Store away from heat and direct sunlight

💡 Lab veteran tips: Wipe first — film does not stick well over a wet rim.
Pull four ways — stretch evenly in four directions for a flush fit.
Press out the air — press the edge down so no bubbles remain.
Do not over-layer — too many layers loosen rather than seal.

Care & Notes

Show care & notes

⚠️ Safety Notes

Match the diameter

film that is too narrow seals poorly and can leak

Limited heat

keep film clear of open flames and hot surfaces

Full shielding

wrap light-sensitive samples with no gaps

Do not
  • No pressure use: do not use film for pressurised or vacuum work
  • Do not reuse: replace after use to avoid cross-contamination

Related Products

More lab essentials

Lab Essentials

Test Tube Brushes

Nylon / Bristle

View details →
Lab Essentials

Lab Labels & Marking

Write-On

View details →
Lab Essentials

Wash Bottles

Specifications to be confirmed

View details →
Lab Essentials

Cotton Wool & Gauze

Gauze Rolls

View details →

Need Sealing Film & Aluminium Foil?

Elastic sealing film rolls, pre-cut squares and aluminium foil in rolls and squares, with a full range and matching supply.

Get a Quote Contact Us
Sealing Film & Aluminium FoilType Elastic sealing film roll / Pre-cut film squares … Get a Quote