Description
Screw cap LDPE brown GL 40 is a laboratory bottle closure made from low-density polyethylene for vessels with a GL 40 thread. The brown LDPE body is intended to protect contents from UV radiation and is therefore suitable for light-sensitive liquids handled in the laboratory. Low-density polyethylene provides a flexible, practical seal for routine bottle use while the brown pigmentation supports light protection during storage and transport. Supplied as a single piece, this screw cap from manufacturer lab-o-plastix fits standard GL 40 laboratory bottles used for photosensitive reagents and related preparations. The brown colour clearly identifies the closure as a light-protective option within mixed bottle inventories. Suitable for general laboratory workflows that require a dependable LDPE screw closure with UV shielding on GL-threaded glassware, it supports careful handling of light-sensitive samples in research, analytical and quality-control settings. The GL 40 thread ensures compatibility with matching laboratory bottles already established on the bench.
This article is part of Screw caps & closures, in Stoppers, caps & closures.
Key features
- Pack size: 1 pc
- Product type: Screw cap
- Material: Low-density polyethylene (LDPE)
- Colour: Brown
- Thread: GL 40
- Light protection: UV shielding for light-sensitive liquids
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Questions about Screw cap, LDPE, amber colour, GL 40
What is this article?
Screw cap, LDPE, amber colour, GL 40 is the article on this page. Luminix Health distributes lab-o-plastix for laboratory use. It sits in Screw caps & closures, inside Stoppers, caps & closures, in Labware.
A screw cap has a thread and a liner. The thread has to match the bottle. The liner has to survive the liquid: a pulp liner fails in a solvent that a PTFE-faced liner ignores. The colour of the cap is not the specification.
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 Screw caps & closures. The catalogue is Labware.
Shelves beside this one are Rubber & silicone stoppers, 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?
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.

