Glass Stoppers
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Lab glass stoppers play a vital role in ensuring safety, accuracy, and cleanliness in any laboratory setup. Whether you’re sealing flasks, test tubes, reagent bottles, or storage containers, the right stopper prevents evaporation, contamination, and accidental spillage, making your workflow more controlled and reliable.
At MEDILAB, we supply a complete range of Borosilicate 3.3 Glass Stoppers and general laboratory stoppers specifically designed to meet the needs of international distributors, bulk importers, and laboratory supply brands.
Our Product Range
1. Hollow Glass Stopper (SKU: 11107)
Lightweight, easy to handle, and ideal for applications where reduced glass-to-glass contact is preferred. The hollow design minimises weight while maintaining a firm, leak-proof seal.
2. Solid Glass Stopper (SKU: 11108)
A classic all-purpose stopper used for reagent bottles, flasks, and chemical storage containers. Provides a secure, airtight closure suitable for routine lab operations.
3. Solid Glass Stopper for B.O.D. Bottle (SKU: 11109)
Specially designed for Biochemical Oxygen Demand (B.O.D.) bottles. Ensures a snug, accurate fit to prevent air interference during water and wastewater analysis.
4. Solid Glass Stopper, Penny Head (SKU: 11110)
Features a rounded “penny head” top for comfortable grip and easy removal. Perfect for frequent use in teaching labs, chemical handling, and storage setups.
Our stoppers are widely used in:
- Chemical storage and reagent handling
- B.O.D. testing and water analysis
- Sample preservation and transport
- Controlled reactions and airtight experiments
- Academic, industrial, and pharmaceutical laboratories
They ensure leak-proof sealing, protect against evaporation, and maintain sample purity.
Precautions
- Avoid using glass stoppers with highly alkaline solutions unless they are verified compatible.
- Do not force a stuck stopper—use gentle heating or lubrication.
- Prevent sudden temperature changes to avoid thermal shock.
- Inspect regularly for chips or cracks, especially at the joint.
- Use proper PPE (gloves, goggles) during handling and cleaning.
Handling Instructions
- Ensure the stopper size matches the glassware joint exactly.
- Clean and dry stoppers before use to maintain airtight sealing.
- Insert stoppers gently using a slight twisting motion—avoid force.
- For ground glass stoppers, apply a thin layer of stopcock grease when necessary.
- Store in a clean, dry place to avoid dust or particle accumulation.
Why International Distributors Choose MEDILAB
- Manufactured from premium Borosilicate Glass 3.3
- High clarity, precision-ground joints, and universal compatibility
- Bulk-friendly export packaging with safe global shipment
- Consistent sizing and OEM/private labeling options
- Trusted by laboratories in 40+ countries.