Catalog Number - 95025-02-1S

The 95025-02-1S MICROSOLV Headspace Caps are designed for headspace GC workflows requiring both chemical resistance and reliable sealing, featuring grey butyl rubber septa laminated with PTFE on both sides.

These caps are fitted in 20 mm aluminum crimp closures with a 10 mm center hole, allowing consistent autosampler needle access while maintaining secure containment of volatile samples.

Laminated Butyl/PTFE Septa – Balanced Performance

• Butyl rubber core with PTFE laminated on both sides

• Combines:

  • Butyl elasticity

  • PTFE chemical resistance

• Minimizes:

  • Extractables

  • Chemical interaction with samples

✅ Ideal for general headspace GC applications requiring improved chemical compatibility over butyl alone

Reliable Sealing with Added Chemical Protection

• Septa hardness: 55° Shore A

• Thickness: 3.0 mm

• Provides:

  • Good resealing after penetration

  • Improved barrier properties vs. non‑laminated septa

✅ Suitable for routine to moderately sensitive analyses

Temperature Compatibility – Headspace Ready

• Operating range:

  • -40°C to 120°C

✅ Works well for standard headspace GC conditions

10 mm Center Hole – Autosampler Access

• Open center design ensures:

  • Smooth needle entry

  • Consistent injection performance

✅ Supports automated headspace systems

Crimp Top Design – Secure Seal Integrity

• 20 mm aluminum crimp cap

• Provides:

  • Airtight sealing

  • Reduced evaporation

  • Reliable containment of volatile compounds

✅ Essential for headspace sample integrity

Designed for 20 mm Headspace Vials

• Compatible with:

  • 20 mm crimp‑top headspace vials

• Ensures:

  • Proper fit

  • Consistent analytical performance

✅ Enables accurate and reproducible results

Positioned Between Butyl and Full PTFE Systems

• Compared to butyl-only:

  • ✅ Better chemical resistance

• Compared to full PTFE/silicone:

  • ✅ More economical

  • ✅ Good general-purpose performance

✅ Ideal when balanced performance and cost are required

Typical Applications

• Headspace GC analysis

• Routine environmental testing

• Pharmaceutical QC

• Food and flavor testing

• General volatile compound analysis

Important Usage Notes

• Requires 20 mm crimping tool for proper sealing

• Laminated PTFE improves:

  • Chemical resistance

  • Sample compatibility

• Best suited for:

  • Routine to moderately sensitive applications