Aluminum Foil and Heat-Sealing Film Singapore
Foil and sealing film look like the cheapest items on the bench and are often the easiest place to lose an experiment. A foil cap that lifts during an autoclave cycle, a plate seal that peels at forty degrees, or a film that clouds a plate reader's optical path can undo hours of careful work after the samples are already made.
At JW RESEARCH SUPPLY, we supply aluminium foil in rolls, sheets and pre-cut squares, plus aluminium, clear and pierceable heat-sealing films for microplates, to laboratories across Singapore. This guide explains how to match the material to the job.
Aluminum Foil Grades Compared
| Type | Thickness | Typical Width | Typical Use |
|---|---|---|---|
| Standard foil roll | 10 – 15 µm | 30 – 45 cm | Covering flasks, light shielding |
| Heavy-duty foil roll | 20 – 25 µm | 30 – 45 cm | Autoclaving, wrapping glassware |
| Pre-cut squares | 15 – 20 µm | 10 × 10 cm to 20 × 20 cm | Batch covering, weighing trays |
| Wide foil roll | 15 – 20 µm | 60 cm | Bench and equipment shielding |
Heat-Sealing Film Selection Data
| Parameter | Aluminium Film | Clear Film | Why It Matters |
|---|---|---|---|
| Optical transparency | Opaque | Transparent | Direct plate reading vs light protection |
| Evaporation barrier | Excellent | Good | Long incubation and storage |
| Pierceability | Standard and pierceable grades | Usually pierceable | Sample recovery after sealing |
| Typical sealing temperature | 150 – 180 °C | 150 – 175 °C | Must suit the plate polymer |
| Dwell time | 2 – 5 s | 2 – 5 s | Seal integrity vs plate distortion |
| Plate compatibility | PP, PS, COC (per spec) | PP, PS (per spec) | Rim geometry varies by plate type |
Choosing Foil and Film
- Autoclave or oven? Go heavy-duty — Thicker foil survives pressure changes and handling.
- Long storage? Go aluminium film — The lowest vapour loss for incubations and archives.
- Plate reader? Go clear — Opaque seals block the optical path entirely.
- Recover samples later? Go pierceable — Designed for tips and autosampler needles.
- Check the polymer — Sealing temperature must suit polypropylene or polystyrene plates.
Working Practice That Protects the Result
Crimp foil caps so they grip the neck rather than resting on top, and leave a small vent so steam can displace air during sterilisation; a tight, sealed foil cover turns a flask into a pressure vessel. Keep foil away from direct contact with strong acids, alkalis and mercury salts, which corrode aluminium and can contaminate a preparation. When sealing plates, always run a test plate and inspect the seal for channels and lifted corners before committing a full batch, and note the sealer temperature and dwell time in the run record so the next person can reproduce it. Remove seals with a consistent technique, because peeling a plate seal too fast generates aerosols; orient the plate away from the face and work in a suitable containment if the samples are hazardous. Store films flat and dust-free, and keep foil rolls off the bench surface where spilled reagents can etch them. Finally, choose a foil gauge and width that match the routine job, since the wrong width wastes time on every wrap.
Why Choose JWRESEARCH for Foil and Sealing Film in Singapore?
- Full range — Standard and heavy-duty foil, pre-cut squares, aluminium and clear sealing films.
- Plate-specific films — Formats matched to PCR, deep-well and assay plates.
- Consistent quality — Uniform gauge and reliable seal performance batch to batch.
- Fast local delivery — Quick dispatch across Singapore so sealing work never stalls.
JWRESEARCH supplies aluminium foil rolls, squares and heat-sealing films for microplates to laboratories across Singapore. Contact us for thicknesses, widths and volume pricing.
📞 +65 8039 3660 | ✉️ SINGAPORE@JWSHY.COM
🌐 www.jwresearch.cn
Frequently Asked Questions
Q: What thickness of aluminum foil should I use in the laboratory?
Standard laboratory foil is around 10 to 15 micrometres thick, which is light enough to wrap tightly around flasks and trays but thin enough to tear at a fold. Heavy-duty foil at roughly 20 to 25 micrometres costs slightly more and resists puncturing, so it is the better choice when the foil must survive autoclaving, repeated handling or being wrapped around sharp glassware. For light shielding and single-use covering, the standard gauge is sufficient. Whatever the gauge, confirm that the foil is a clean, uncoated aluminium grade with no food-service lacquer if it will contact samples or be heated in an oven.
Q: Can aluminum foil be autoclaved or put in a hot-air oven?
Aluminium foil handles autoclave cycles and hot-air ovens well because the metal itself tolerates far more heat than the sterilisation temperature requires. The practical limits are the wrap, not the foil: a loose foil cap can blow off during the vacuum and pressure changes of an autoclave cycle, and foil pressed directly against glass will mark it. Use a heavy-duty gauge, crimp the foil so it grips the neck, and leave the foil slightly loose so steam can displace air. Do not put foil in a microwave oven, and keep it away from direct contact with strong acids, alkalis and mercury salts, which attack aluminium.
Q: How do I choose between aluminium sealing film and clear sealing film for microplates?
Choose aluminium sealing film when the priority is a barrier: it gives the lowest vapour loss and the best protection against evaporation during long incubations, thermal cycling and storage, and it blocks light, which matters for photosensitive compounds. Choose clear or optically transparent film when you need to read the plate directly, for example absorbance or fluorescence measurements in a plate reader, because aluminium is opaque. Pierceable aluminium films allow sample recovery through the seal with a pipette tip or autosampler needle, so they suit storage combined with later analysis. Check that the film is specified for your plate type, since PCR plates, deep-well plates and 96-well assay plates differ in rim geometry.
Q: What sealing temperature and pressure do heat-sealing films require?
Heat-sealing films are applied with a plate sealer rather than by hand, and the correct setting depends on the film and the plate polymer. Typical sealing temperatures fall between roughly 150 and 180 degrees Celsius for aluminium and polyester-based films, applied for a few seconds at moderate pressure, but polypropylene and polystyrene plates need different profiles and a lower temperature may be required for polystyrene to avoid deforming the plate. Always follow the film manufacturer's recommended temperature, pressure and dwell time, and run a seal integrity check on a spare plate before sealing an entire batch. Under-sealing leaks during centrifugation or thermal cycling; over-sealing can warp the plate.