Description
Silicone rubber gasket GL 25 is a PTFE-coated sealing element designed for laboratory glassware equipped with GL 25 screw threads. The silicone rubber body combined with a PTFE coating offers a resilient seal with an improved contact surface for bottles, flasks and related vessels in analytical and preparative environments. Delivered as a single piece with a net weight of 0,002 kg, this gasket functions as a spare or replacement part for GL 25 connections where a durable, flexible seal is needed. The PTFE coating assists in reducing adhesion at the sealing interface, while the silicone core preserves the elasticity required for frequent assembly and disassembly. Intended for use with corresponding screw caps and bottle necks of the GL 25 standard, it is grouped among septa and sealing accessories and is manufactured by Witeg in Germany. Its defined GL 25 size ensures proper dimensional match with common laboratory thread systems, supporting reliable, leak-tight closures on glassware during routine handling, storage and transfer of liquids and reagents in the laboratory.
This article is part of Bottle accessories (pouring rings, dispensers, caps), in Bottles & containers.
Key features
- Pack size: 1 pc
- Product type: Silicone rubber gasket, PTFE-coated
- Thread size: GL 25
- Country of origin: Germany
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Questions about Silicone rubber seal GL 25
What is this article?
Silicone rubber seal GL 25 is the article on this page. Luminix Health distributes Witeg for laboratory use. It sits in Bottle accessories (pouring rings, dispensers, caps), inside Bottles & containers, in Labware.
Bottle accessories are the pieces on the neck: a pouring ring, a dispenser seat, a cap liner, a tamper ring. They decide how the bottle delivers and whether the closure still matches after the original cap is gone.
A laboratory bottle is a closed container with a stated volume and a neck that takes a cap, a stopper or a dispenser. Borosilicate glass is the choice when the liquid is a solvent, or when the bottle will be heated or autoclaved. Polyethylene and polypropylene are the choice when the bottle must not shatter, or when hydrofluoric acid would attack glass. A narrow mouth pours. A wide mouth is for powders and for reaching the bottom. Laboratory ware of this kind is indexed under ISO laboratory glassware. Traceable volume sits with the BIPM and NIST Physical Measurement.
Which category should I open next?
The category is Bottles & containers. The sub-category is Bottle accessories (pouring rings, dispensers, caps). The catalogue is Labware.
Shelves beside this one are Laboratory glass bottles, Plastic bottles (narrow & wide mouth), Sample containers & jars, Canisters & jerrycans and Wash bottles.
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.
