Description
Silicone seal for GL 25 thread without PTFE collar is a laboratory sealing element featuring an inner diameter of 12 mm. Made of silicone, it matches screw connection closures produced from PBT and is intended for fixing tubes as well as providing dependable sealing. Supplied as 1 pc, the product bears the DURAN ® registered trademark and originates from manufacturer Duran/DWK Life Sciences. Its net weight of 0,001 kg keeps the component light for convenient handling in laboratory setups. The seal is particularly suited to GL-threaded systems that require a flexible silicone interface without an accompanying PTFE collar. In practice it enables secure tube retention and effective sealing at connection points. Compatibility with PBT closures ensures straightforward integration into existing glassware and tubing arrangements used in scientific work. This silicone gasket supports routine fixation and sealing duties wherever GL 25 threads are employed.
This article is part of Lids & seals, in Stoppers, caps & closures.
Key features
- Pack size: 1 pc
- Storage temperature: Standard
- Material: Silicone
- Thread size: GL 25
- Inner diameter: 12 mm
- EAN: 4032051048294
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Questions about Silicone Sealing Ring , for GL threads, without PTFE washer
What is this article?
Silicone Sealing Ring , for GL threads, without PTFE washer is the article on this page. Luminix Health distributes DWK Life Sciences for laboratory use. It sits in Lids & seals, inside Stoppers, caps & closures, in Labware.
Lids and seals are the covers of dishes, jars and tanks: a snap lid, a sealing film, a gasket. The seal is doing the work. A lid that only rests on the rim does not contain a volatile liquid.
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 Lids & seals. The catalogue is Labware.
Shelves beside this one are Screw caps & closures, Rubber & silicone stoppers, Ground-joint glass stoppers 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. 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.

