Description
Silicone seal GL45 42x26 with PTFE collar is a laboratory sealing component designed for reliable closure on GL 45 threaded necks. The seal combines a flexible silicone body with a vulcanised PTFE collar, giving chemical resistance at the contact face while maintaining elasticity for a tight fit. Outer diameter is 42 mm and inner diameter is 26 mm, matching tubes in the 25,0–27,0 mm range. This geometry supports secure sealing of bottles, reactors and process vessels commonly used in analytical and preparative work. Supplied in packs of 10 pieces, the seal is suited to routine laboratory handling and repeated assembly. The silicone–PTFE construction from manufacturer Witeg balances compressibility with a chemically inert sealing surface, helping to reduce leakage and contamination risk at the joint. Net weight is 0,009 kg per unit. Ideal for septa and closure applications where GL 45 compatibility and defined tube diameters are required, this seal integrates cleanly into standard laboratory glassware and tubing setups without additional adapters.
This article is part of Vial caps & septa, in Vials, caps & septa.
Key features
- Pack size: 10 pc(s)
- Material: Silicone with vulcanised PTFE collar
- Thread size: GL 45
- Outer diameter: 42 mm
- Inner diameter: 26 mm
- Suitable for tube: 25,0–27,0 mm
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Questions about Gaskets GL 45
What is this article?
Gaskets GL 45 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.