Parafilm Sealing Film Singapore: Laboratory Parafilm M Guide
Parafilm is a stretchable, self-sealing, moisture-resistant laboratory film used in virtually every Singapore lab — from sealing culture flasks and petri dishes to wrapping samples and protecting instruments. The most widely used variant, Parafilm M, has become the default choice for quick, reliable, reversible sealing in research, clinical, and teaching laboratories.
At JW RESEARCH SUPPLY, we supply Singapore laboratories with Parafilm sealing film in bulk. This guide covers the properties, temperature range, sealing techniques, and best practices that help you get the most from this versatile consumable.
Why Parafilm Matters
Proper sealing prevents evaporation, contamination, and sample loss. Unlike rigid caps or stoppers, Parafilm conforms to irregular shapes and creates a temporary barrier that is easy to apply and remove. For labs following GLP or ISO 15189, consistent, documented sealing practices are part of maintaining sample integrity.
Properties of Parafilm M
- Self-sealing — Stretches and clings to itself and to glass, plastic, and metal.
- Moisture-resistant — Reduces evaporation from sealed containers.
- Flexible and conformable — Wraps around irregular shapes and threaded openings.
- Removable and reusable — Can be peeled off and reapplied (within limits).
- Temperature tolerant — Suitable for routine lab use across a broad range.
Parafilm M Specifications
| Property | Typical Value | Notes |
|---|---|---|
| Material | Wax + polyolefin blend | Parafilm M formulation |
| Temperature Range | −45°C to +50°C | Brief autoclave exposure tolerable |
| Thickness | ~0.127 mm | Standard roll |
| Standard Roll Size | 4 in × 125 ft (10 cm × 38 m) | Common laboratory format |
| Moisture Barrier | High (vapour-resistant) | Reduces evaporation |
| Gas Permeability | Very low (limited diffusion) | Not a defined breathable membrane |
Sealing Techniques
- Stretch before applying — Gently stretch a strip to activate its cling, then wrap around the opening.
- Wrap the rim fully — Press the film firmly around the entire circumference for an airtight seal.
- Overlap layers — For volatile or sensitive samples, apply two layers in a criss-cross pattern.
- Label through the film — Use a permanent marker on the film for clear, removable labelling.
- Avoid over-stretching — Excess thinning can create micro-tears that compromise the seal.
Best Practices
- Store properly — Keep in a cool, dry place away from heat and sunlight.
- Use clean hands or gloves — Avoid contaminating the film before application.
- Match film to application — For defined gas exchange, use breathable films instead.
- Verify seal integrity — Check critical samples for a tight, wrinkle-free seal.
Why Choose JWRESEARCH for Parafilm in Singapore?
- Genuine quality — Reliable Parafilm M-equivalent sealing film with consistent properties.
- Bulk supply — Standard rolls and dispenser boxes for every lab size.
- Local availability — Fast dispatch within Singapore, no long overseas lead times.
- Competitive pricing — Match-or-beat pricing on name-brand equivalents.
- Expert support — Advice on sealing materials for specialised applications.
JWRESEARCH supplies Parafilm sealing film to Singapore research institutes, clinical labs, and universities. Contact us for competitive quotations and bulk discounts.
📞 +65 8039 3660 | ✉️ SINGAPORE@JWSHY.COM
🌐 www.jwresearch.cn
Frequently Asked Questions
Q: What is Parafilm used for in the laboratory?
Parafilm M is a flexible, self-sealing, moisture-resistant film used to seal flasks, beakers, test tubes, petri dishes, and other containers to prevent evaporation and contamination. It is also used to wrap samples, protect instruments during storage, and temporarily seal culture vessels while still allowing some gas exchange.
Q: What temperature range can Parafilm M withstand?
Parafilm M is typically rated for use from approximately -45°C to +50°C. It can withstand brief autoclaving temperatures, but it is not designed for prolonged high-temperature exposure. For applications requiring extreme cold storage or high heat, verify the specific temperature requirements against the manufacturer's datasheet.
Q: Is Parafilm M gas-permeable?
Parafilm M is not freely gas-permeable like a membrane — it provides a moisture-resistant barrier. However, when stretched over culture vessels it seals while still permitting very limited gas diffusion, which is why it is sometimes used in plant tissue culture and microbiology. For applications requiring defined gas exchange, a dedicated breathable sealing film or vented cap is recommended.
Q: How should I store Parafilm to keep it in good condition?
Store Parafilm M in a cool, dry place away from direct sunlight and heat sources, as excessive heat can cause the film to become sticky or degrade. Keep it in its original dispenser or box to protect it from dust and contamination. When stored properly, Parafilm retains its sealing properties for long periods.