Description
Silicone gasket #8 is a laboratory sealing component sized for vacuum filtration assemblies, with an upper diameter of 41 mm and a lower diameter of 33 mm. It provides the interface seal in setups built around high-quality borosilicate glass LBG 3.3 that combine a base with a porous glass plate, funnel and aluminium clamp. The gasket supports use with suction flask FFE3-1K0-002 or a multiple vacuum filtration device, helping maintain a reliable seal under reduced pressure during routine solid–liquid separations. Supplied as one piece with a net weight of 0,045 kg, this #8 silicone gasket from manufacturer Labbox suits glass filter, frit and related filtration glassware workflows where dimensional match to the #8 designation is required. Its defined top and bottom diameters simplify pairing with matching funnel bases and holders in analytical and preparative filtration work. The component is intended for laboratory filtration hardware rather than general plumbing use, and integrates cleanly into modular vacuum filtration trains used across chemistry and life-science benches.
This article is part of Rubber & silicone stoppers, in Stoppers, caps & closures.
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Questions about Silicone stopper #8
What is this article?
Silicone stopper #8 is the article on this page. Luminix Health distributes Labbox for laboratory use. It sits in Rubber & silicone stoppers, inside Stoppers, caps & closures, in Labware.
A rubber or silicone stopper is pushed into a mouth. The size number corresponds to a top and bottom diameter. Silicone survives higher temperatures and more autoclave cycles. Natural rubber is attacked by oils and by some solvents.
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 Rubber & silicone stoppers. The catalogue is Labware.
Shelves beside this one are Screw caps & closures, Ground-joint glass stoppers, Lids & seals 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?
We deliver across the EU, usually within two to five working days. More is on Delivery across the EU. 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.

