Description
Silicone seals for GL 25 threads with PTFE coating are precision laboratory sealing components sized 22 × 2 mm for reliable closure of GL-threaded glassware and process vessels. The silicone body supplies the elasticity needed for a tight, reusable fit, while the PTFE surface layer improves chemical resistance and reduces sticking to media or vessel necks. These seals are intended for bottles, reactors and other GL 25 equipment used in synthesis, sample handling and analytical work where a chemically more inert contact surface is preferred. Packaged as 10 pc(s) and offered by manufacturer Witeg, they support routine laboratory stocking with a low net weight of 0,002 kg per unit. The PTFE-coated design helps maintain seal integrity during heating, mixing or storage and is well suited to septa and sealing tasks that demand both flexibility and improved media compatibility. Compact dimensions make the seals easy to install and replace in everyday lab workflows without altering standard GL 25 thread geometry.
This article is part of Vial caps & septa, in Vials, caps & septa.
Key features
- Pack size: 10 pc(s)
- Material: PTFE-coated silicone
- Thread size: GL 25
- Dimensions: 22 × 2 mm
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Questions about Silicone rubber seals GL 25 PTFE
What is this article?
Silicone rubber seals GL 25 PTFE is the article on this page. Luminix Health distributes Witeg for laboratory use. It sits in Vial caps & septa, inside Vials, caps & septa, in Chromatography equipment.
A vial cap and a septum have to match the vial neck: crimp, screw or snap, and the diameter. The septum material, PTFE/silicone or rubber, decides chemical resistance and how many times a needle can pierce it. A septum that sheds into the solvent becomes ghost peaks.
An autosampler vial is the small closed bottle a chromatograph picks up. The neck is crimp, screw or snap, and the cap and the septum have to be that neck. The septum is the part the needle pierces. A soft septum reseals. A septum that is wrong for the solvent swells or sheds particles into the sample. Inserts reduce the volume when the sample is scarce. The separation they feed is described with IUPAC names and PubChem data.
Which category should I open next?
The category is Vials, caps & septa. The sub-category is Vial caps & septa. The catalogue is Chromatography equipment.
Shelves beside this one are Chromatography accessories, Autosampler vials, Crimpers & decappers and Vial inserts.
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. Articles in stock ship within 2–5 business days. 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.