Silicone Stoppers, Lab-Grade High Quality
From $9.90 (Ex GST)
- Solid silicone stoppers for compatible laboratory glassware and conical flasks
- High-quality silicone material supports routine laboratory sealing applications
- Designed for high-temperature and chemical-resistant laboratory use
- Tapered stopper profile supports practical fitting into compatible flask necks
- Available in two size options for 250/500 mL and 1000/2000 mL conical flasks
- Top and bottom outside diameters are listed with ±2 mm tolerance
- Suitable for laboratory and educational use under appropriate supervision
- Description
Description
The Silicone Stoppers, also known as solid laboratory silicone flask stoppers, are designed for sealing compatible conical flasks and laboratory glassware during routine laboratory and educational workflows. They are suitable for school laboratories, university teaching laboratories, chemistry laboratories, preparation rooms and general laboratory workspaces. Each stopper is made from solid silicone material. Silicone provides practical flexibility for fitting into compatible flask necks and supports laboratory use where a durable, reusable stopper is required.
The stoppers are described as high-temperature and chemical resistant, making them suitable for many routine laboratory sealing applications. Users should confirm chemical compatibility, temperature suitability and flask fit before use, especially when working with heated vessels or reactive chemicals. The tapered profile helps the stopper seat into the neck of compatible conical flasks. The listed dimensions include both top outside diameter and bottom outside diameter, with a stated tolerance of ±2 mm.
Two size options are available. Silicone.ST.29 has a top outside diameter of 31 mm and bottom outside diameter of 28 mm, and is listed as suitable for 250 mL and 500 mL conical flasks. Silicone.ST.33 has a top outside diameter of 37 mm and bottom outside diameter of 31.5 mm, and is listed as suitable for 1000 mL and 2000 mL conical flasks.
LabChoice Australia supplies Silicone Stoppers for school science departments, university teaching laboratories, chemistry laboratories, preparation rooms, research laboratories and general laboratory environments. They are suitable for sealing compatible conical flasks during supervised laboratory handling, preparation, storage and routine bench work.
| Item Code | Top OD(±2mm) | Bottom OD(±2mm) | Suitable Conical Flask |
|---|---|---|---|
| LC-12-SS451 | 31 mm | 28 mm | 250/500 ml Flask |
| LC-12-SS452 | 37 mm | 31.5 mm | 1000/2000 ml Flask |
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What Our Customers Say
⭐⭐⭐⭐⭐
We ordered a set of customised BORO 3.3 borosilicate glassware for our teaching labs, and LabChoice Australia exceeded every expectation. From the first consultation to final delivery, their team listened carefully, offered expert advice, and ensured every piece matched our specifications perfectly.
The clarity and precision of the glassware are exceptional, and the quick turnaround made setup effortless. It’s refreshing to work with an Australian supplier who genuinely understands laboratory needs and takes pride in quality craftsmanship. We’ll definitely be returning to LabChoice for future glassware requirements
⭐⭐⭐⭐⭐
Our lab required high-precision BORO 3.3 glassware for analytical testing, and LabChoice Australia delivered outstanding results. The ordering process was simple, communication was clear, and every beaker and flask arrived perfectly calibrated and ready for use.
The quality of the glass is exceptional — resistant to heat, easy to clean, and consistently accurate in measurement. It’s reassuring to know there’s an Australian supplier that combines scientific precision with genuine customer care. I’d recommend LabChoice to any research team looking for dependable labware
⭐⭐⭐⭐⭐
We needed a set of customised borosilicate glassware for a specialised project, and LabChoice Australia delivered exactly what we envisioned. The team worked closely with us from design to production, ensuring every detail met our specifications. The craftsmanship is exceptional, and the turnaround time was impressive. It’s reassuring to know we can rely on them for unique, made-to-order pieces
⭐⭐⭐⭐⭐
LabChoice Australia has completely changed the way we source our lab glassware. The quality is consistently top-notch, and every piece meets the precision we need for reliable results. Their team knows their stuff, answers our questions quickly, and always goes the extra mile to help — they’re more like partners than just a supplier.
⭐⭐⭐⭐⭐
We trust LabChoice Australia because they deliver every time. Their borosilicate glassware is durable, accurate, and perfect for the high-heat work we do. Everything arrives well-packed with clear specs, so there are never surprises. It’s reassuring to deal with a supplier who understands both compliance and the demands of a busy lab