Description
Headspace cap 20 mm rubber/PTFE is a laboratory crimp closure designed specifically for headspace analysis and related vial sealing applications. These aluminium caps incorporate a rubber/PTFE sealing system that combines the elasticity of rubber with the chemical inertness of PTFE, ensuring reliable seals for volatile sample work. The 20 mm diameter corresponds to standard headspace vial formats used in gas chromatography and related analytical techniques. Supplied in packs of 100 pieces from manufacturer IDL GmbH, the caps support efficient laboratory operations and consistent sample preparation. The rubber/PTFE combination provides a tight, chemically resistant barrier that helps maintain sample integrity during equilibration, heating and instrumental analysis. Suitable for headspace sampling workflows and other laboratory procedures requiring aluminium crimp caps with rubber/PTFE liners, these components deliver dependable closure performance. Their robust design meets the practical demands of routine analytical laboratories where reproducible sealing is essential for accurate results.
This article is part of Screw caps & closures, in Stoppers, caps & closures.
Key features
- Pack size: 100 pc(s)
- Diameter: 20 mm
- Housing material: Aluminium
- Seal material: Rubber/PTFE
- Product type: Headspace cap
- Technical Information Sheet:
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Questions about Head-space caps, 20 mm, butyl/PTFE
What is this article?
Head-space caps, 20 mm, butyl/PTFE is the article on this page. Luminix Health distributes IDL GmbH for laboratory use. It sits in Screw caps & closures, inside Stoppers, caps & closures, in Labware.
A screw cap has a thread and a liner. The thread has to match the bottle. The liner has to survive the liquid: a pulp liner fails in a solvent that a PTFE-faced liner ignores. The colour of the cap is not the specification.
A closure is the part that decides whether a bottle stays shut and whether the contents attack the seal. A ground-glass stopper matches a ground neck. A screw cap needs the right thread and a liner that survives the liquid. Rubber and silicone stoppers push into a mouth. The liner, not the colour of the cap, is the chemical choice. The vessels they close are indexed under ISO laboratory glassware.
Which category should I open next?
The category is Stoppers, caps & closures. The sub-category is Screw caps & closures. The catalogue is Labware.
Shelves beside this one are Rubber & silicone stoppers, Ground-joint glass stoppers, Lids & seals and Closures (other).
What should I check before I order?
When this page shows a safety data sheet, use that manufacturer file. Hazard text does not belong in the sales description. For a pack size, a grade or a certificate that is not on the page, send a quote request or contact the team.
How does ordering and shipping work?
Luminix Health distributes this article from the heart of Europe. Delivery across Europe, two to five days when in stock. Standard delivery is free from €250 excl. VAT. Cold-chain goods and dangerous goods under ADR are never included in that free delivery. The terms are in the Shipping Policy. The full brand index is on shop by brand. Who we are is on about us.
Which other categories should I open?
The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.
