Description
Seals for conical ground joints are PTFE sealing elements intended for standard ground joint size 12 in laboratory glass assemblies. They support reliable joint sealing in glassware used for distillation, extraction, and related glass-component setups where conical ground joints must fit cleanly and remain protected during assembly and use. PTFE construction is well suited to laboratory joint applications that require a chemically resistant sealing interface between mating ground surfaces. These seals help laboratories maintain consistent connections on conical ground joint glassware without altering the joint geometry itself. Each pack contains 50 pieces and has a net weight of 0,006 kg, making the format practical for stocking glass workshops, teaching laboratories, and routine synthesis or sample-preparation benches. The seals are offered by manufacturer Glindemann and belong with glass components, distillation and extraction accessories, and other ground-joint sealing products. Specifying the correct standard ground joint size 12 ensures compatibility with matching conical joints in existing apparatus. Compact pack quantity and defined joint size simplify replenishment and standardisation of PTFE seals across multi-user laboratory environments.
This article is part of Ground-joint glassware (other), in Distillation & extraction glassware.
Key features
- Pack size: 50 pc(s)
- Product type: Seals for conical ground joints
- Material: PTFE
- Ground joint size: Standard ground joint 12
- Weight: 0,006 kg
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Distillation & extraction glassware
Sub-category
Ground-joint glassware (other)
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Questions about Seals f. conical ground joints, PTFE, for standard ground joint 12, 50 unit(s)
What is this article?
Seals f. conical ground joints, PTFE, for standard ground joint 12, 50 unit(s) is the article on this page. Luminix Health distributes Glindemann for laboratory use. It sits in Ground-joint glassware (other), inside Distillation & extraction glassware, in Labware.
This is ground-joint glassware that is not a head, a condenser or a Soxhlet: receivers, blank joints, odd adapters. A ground joint is named by the wide end and the length, such as 29/32. Mismatched joints do not seal, even with grease.
Distillation separates liquids by boiling point. A condenser turns the vapour back into liquid: Liebig, coil and cold-finger shapes differ in how much cooling surface they offer. A still head and a column sit between the flask and the condenser. A Soxhlet extractor washes a solid again and again with the same solvent. Ground joints have a standard size, and the joint, not the flask, is what has to match. The pieces are indexed under ISO laboratory glassware.
Which category should I open next?
The category is Distillation & extraction glassware. The sub-category is Ground-joint glassware (other). The catalogue is Labware.
Shelves beside this one are Distillation heads, adapters & columns, Condensers and Soxhlet & extraction apparatus.
What should I check before I order?
The technical information on this page is the manufacturer's sheet. Read that, not a rewritten specification.
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.

