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Reliable Sealing for Flasks, Bottles, and Process Equipment
A loose stopper means lost samples, contaminated reagents, and failed experiments. In industrial settings, an inadequate plug leads to leaks, spills, and safety risks. Our rubber stopper for laboratory and industrial sealing applications delivers a tight, reliable seal for glassware and process equipment across a wide range of operating conditions.
A rubber stopper is a tapered elastomeric plug used to seal flasks, bottles, tubes, and other containers. The tapered design compresses as it is inserted, creating a friction fit that holds under pressure and prevents leakage. Rubber stoppers are essential in laboratories for sample storage, reaction setups, and vacuum applications, and in industry for sealing containers, pipes, and process equipment.
Laboratory Stopper – Precision-molded for a consistent fit in standard glassware. Available in solid, one-hole, and two-hole configurations for tubing connections. Sizes from 000 to 12 and custom dimensions.
Silicone Stopper – Wide temperature range from -60°C to +200°C. FDA and USP Class VI compliant. Ideal for high-temperature applications, sterilization, and food or pharmaceutical contact.
EPDM Stopper – Excellent water, steam, ozone, and weather resistance. Suitable for outdoor and wet environments.
Reliable Sealing – Tapered design compresses for a tight fit that holds under pressure.
Chemical Resistance – Selected materials resist acids, bases, solvents, and oils.
Temperature Range – Available from -60°C to +200°C depending on material.
Custom Sizes – Standard and custom dimensions to fit your glassware or equipment.
Reusable – Durable elastomers maintain elasticity through repeated use and cleaning.
Silicone – Extreme temperatures, FDA compliance. Best for sterilization and food contact.
EPDM – Water, steam, ozone, weather. Best for outdoor and wet environments.
NBR – Oil, fuel, hydraulic fluid. Best for petroleum applications.
Natural Rubber – General-purpose sealing for routine laboratory use.
Laboratory flasks, bottles, and test tubes
Sample storage and transport
Vacuum filtration and distillation setups
Pharmaceutical and biotech processing
Food and beverage containers
Industrial pipe and container plugging
Chemical storage and transport
Every rubber stopper undergoes 100% visual and dimensional inspection before shipment. Material certificates and traceability are available upon request. Our products meet relevant industry standards including ISO, ASTM, and DIN specifications.
Contact our technical team with your dimensions, material requirements, operating temperature, and chemical exposure. We will provide a tailored rubber stopper solution with detailed specifications and a competitive quote.
Choose the rubber stopper that seals reliably—delivering dependable performance, extended service life, and simplified maintenance.
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