Description
DURAN® silicone seal GL 18 with PTFE coating is a peroxide-cured VMQ gasket designed as a replacement cap seal for laboratory screw closures. The PTFE-coated face delivers good chemical resistance, while the silicone body provides efficient sealing performance at the bottle or vessel neck. Thermal resistance reaches 130 °C under steam and 200 °C under dry heat. Compatible sizes exist for PBT screw caps and tamper-evident closures, positioning the seal as a ready spare for red PBT caps on GL 18 threads. This component from manufacturer Duran/DWK Life Sciences helps maintain secure, leak-tight closures in sample-handling and reaction vessels. Offered as a single piece with a net weight of 0,001 kg, the peroxide-cured silicone construction withstands repeated exposure to chemically aggressive laboratory media. Laboratory professionals select the PTFE-coated septum design whenever both chemical inertness and elevated-temperature stability are needed at the cap interface of GL 18 systems.
This article is part of Vial caps & septa, in Vials, caps & septa.
Key features
- Pack size: 1 pc
- Storage temperature: Standard
- Type: PTFE-coated silicone seal (VMQ)
- Thread size: GL 18
- Thermal resistance: 130 °C (steam), 200 °C (heat)
- EAN: 4032051064201
- Technical Information Sheet:
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Questions about DURAN® Replacement Cap Liner, PTFE-coated, peroxide cured silicone, VMQ
What is this article?
DURAN® Replacement Cap Liner, PTFE-coated, peroxide cured silicone, VMQ is the article on this page. Luminix Health distributes DWK Life Sciences 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.
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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.