ConductScience Parafilm M, 4in x 125ft Roll (Bulk 20-Pack)
$28.00 per unit | 20 units per pack Bulk pricing: Bulk 20-Pack at $560.00 ($28.00 per unit)
| Automation Level | manual |
Parafilm M is a flexible, self-sealing laboratory film designed for moisture-resistant sealing applications across research and analytical workflows. The 4-inch width provides convenient coverage for standard laboratory containers, flasks, and apparatus while the 125-foot length offers extended use for high-throughput operations.
This stretchable paraffin film conforms to irregular surfaces and creates an effective barrier against moisture, gases, and contaminants. The self-sealing properties eliminate the need for adhesives or heat activation, making it suitable for temperature-sensitive applications and sterile environments where contamination control is critical.
How It Works
Parafilm M operates through the viscoelastic properties of its paraffin-based polymer matrix. When stretched, the material exhibits plastic deformation that allows it to conform to irregular surfaces and maintain contact pressure against container rims and apparatus openings.
The self-sealing mechanism relies on the film's ability to cold-flow under applied pressure, creating intimate contact with substrate surfaces. This molecular-level adhesion provides an effective barrier against moisture vapor transmission while maintaining flexibility across temperature ranges typical in laboratory environments.
The semi-permeable nature allows controlled gas exchange when loosely applied, making it suitable for applications requiring atmospheric equilibration while preventing bulk moisture transfer and particulate contamination.
Features & Benefits
Automation Level
- manual
Research Domain
- Analytical Chemistry
- Cell Biology
- Environmental Monitoring
- Food Science
- Microbiology
- Pharmaceutical QC
Weight
- 30.92 kg
Dimensions
- L: 1500.0 mm
- W: 48.0 mm
- H: 28.8 mm
Comparison Guide
| Feature | This Product | Typical Alternative | Advantage |
|---|---|---|---|
| Roll Length | 125 feet continuous length | Shorter rolls require more frequent replacement | Reduces interruption of laboratory workflows and inventory management overhead during extended operations. |
| Width Specification | 4-inch width for standard coverage | Narrow widths may require multiple strips | Single application covers most laboratory containers, reducing application time and ensuring uniform sealing. |
| Self-Sealing Properties | No adhesive or heat activation required | Some alternatives require heat or pressure activation | Simplifies application in sterile environments and eliminates equipment requirements for seal activation. |
| Surface Conformability | Flexible adaptation to irregular shapes | Rigid alternatives may leave gaps on irregular surfaces | Ensures complete sealing contact across diverse laboratory glassware and apparatus configurations. |
This 4-inch x 125-foot format provides extended use capacity with convenient width sizing for standard laboratory applications. The self-sealing properties eliminate activation requirements while maintaining flexible conformability across diverse container types.
Practical Tips
Pre-stretch the film before application to improve surface contact and sealing effectiveness.
Why: Activates the elastic properties and enhances conformability to irregular container shapes.
Work from center outward when applying to eliminate air bubbles and ensure uniform contact pressure.
Why: Prevents trapped air that could compromise the moisture barrier and creates more reliable seal integrity.
Store rolls in cool, dry conditions away from direct sunlight and heat sources.
Why: Prevents premature softening and maintains optimal handling characteristics for consistent application.
Ensure adequate ventilation when sealing containers with volatile compounds or gases.
Why: The semi-permeable nature may allow some gas exchange, requiring proper ventilation for safety.
Check seal integrity periodically for long-term storage applications to ensure continued barrier effectiveness.
Why: Maintains sample quality and experimental reproducibility by preventing contamination or desiccation over time.
If film tears during application, use shorter segments and reduce stretching force.
Why: Prevents material waste and ensures successful sealing by working within the film's elastic limits.
Setup Guide
What’s in the Box
- Parafilm M roll, 4 inches x 125 feet
- Product documentation (typical)
Warranty
ConductScience provides standard manufacturer warranty coverage for material defects and performance specifications. Technical support available for application guidance and troubleshooting.
Compliance
What is the optimal stretching ratio for maximum conformability?
Stretch to approximately 1.5-2 times original length to activate elastic properties while avoiding over-stretching that could compromise barrier integrity.
Can Parafilm M withstand autoclave sterilization?
Consult product datasheet for specific temperature limits. Standard Parafilm M typically softens at elevated temperatures and may not be suitable for autoclave cycles.
How does moisture permeability compare to other sealing methods?
Provides semi-permeable barrier allowing controlled gas exchange while blocking bulk moisture transfer, unlike impermeable caps or completely permeable coverings.
What surface preparation is required for optimal adhesion?
Clean, dry surfaces provide best adhesion. Remove oils, dust, and moisture from container rims before application to ensure complete edge contact.
Is the film compatible with organic solvents?
Limited compatibility with organic solvents. Consult chemical compatibility data for specific solvents as prolonged exposure may compromise barrier properties.
How long can sealed containers be stored?
Storage duration depends on application requirements and environmental conditions. Monitor seal integrity over time for critical long-term storage applications.
Can multiple layers be applied for enhanced barrier properties?
Multiple layers can be applied for increased barrier effectiveness, though single layer application typically provides adequate protection for most laboratory applications.
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