Choosing the right septa can affect sample integrity, chemical compatibility, and overall laboratory performance. Use the comparison table below to evaluate the key differences between ILT’s Pharma-Fix and Pharma-Fix II™ septa, including materials, PTFE coverage, temperature range, and application suitability, so you can select the best option for your workflow.
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ILT Pharma-Fix vs Pharma-Fix II™ Septa Comparison Table
August 20, 2026
| Characteristic | Pharma-Fix | Pharma-Fix II™ |
|---|---|---|
| Septa Material | Gray Butyl/Natural PTFE Disc | Dark Gray Silicone/Natural PTFE |
| Crimp Type: Available Sizes & Configurations | 20mm Aluminum 20mm Silver Steel 20mm Bi-Metal 20mm Pressure Release 13mm Aluminum 13mm Silver Steel 13mm Aluminum Tear Off Seal | 20mm Aluminum 20mm Silver Steel 20mm Bi-Metal 20mm Pressure Release 13mm Aluminum 13mm Silver Steel 13mm Aluminum Tear Off Seal |
| PTFE | Center PTFE disc (does not go to edge) | Full face PTFE coating (edge to edge) |
| Chemical Compatibility | Moderate | High |
| Temperature Range | -20°C to 130°C | -65°C to 210°C |
| Bleed/Extractables Performance | Low-Bleed | Low-Bleed |
| Needle Penetration Performance | Good | Excellent |
| Sample Protection | Limited PTFE barrier | Enhanced PTFE barrier |
| Primary Applications | Headspace analysis, chromatography, pharmaceutical testing, environmental | Headspace analysis, chromatography, pharmaceutical testing, environmental |
Find the Right Septa for Your Application
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Whether you’re supporting pharmaceutical research, environmental testing, or routine chromatography workflows, ILT can help you choose the right septa for your performance requirements. Contact our team to discuss your application or request additional product information.
