Description
Silicone rubber gasket GL45 is a PTFE-coated sealing component engineered for laboratory glassware fitted with GL 45 screw threads. The construction pairs a resilient silicone rubber core with a PTFE coating that enhances chemical resistance and lowers surface adhesion, allowing effective use as a septum or sealing disc in bottles, flasks and reaction systems. It provides dependable closure performance across analytical, preparative and routine laboratory applications. Offered as a single piece with a net weight of 0,005 kg and originating from Germany, the gasket is manufactured by Witeg. The PTFE layer helps limit unwanted sample contact and supports clean removal, while the silicone body maintains elasticity for repeated sealing cycles. Designed to fit standard GL 45 screw caps, this gasket serves research, quality-control and production environments that require inert, reliable septa for secure laboratory glassware connections.
This article is part of Bottle accessories (pouring rings, dispensers, caps), in Bottles & containers.
Key features
- Pack size: 1 pc
- Material: Silicone rubber
- Coating: PTFE-coated
- Thread size: GL 45
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Questions about Silicone rubber seal GL 45
What is this article?
Silicone rubber seal GL 45 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.
