Lab Manager | Run Your Lab Like a Business

Product News

A Proper Stopper for DURAN® GL 45 Bottles from DWK Life Sciences

DWK has developed the new DURAN® stoppers from a high-purity bromobutyl rubber elastomer

DWK Life Sciences

Mainz (PresseBox) — DWK Life Sciences has launched a new DURAN® branded GL 45 synthetic rubber stopper specifically shaped for the reliable sealing of all laboratory bottles with a GL 45 neck finish.

 DURAN® branded GL 45 synthetic rubber stopperThanks to the virtual inertness of DURAN® borosilicate 3.3 glass, high value and sensitive materials are routinely stored in the DURAN® Original GL 45 laboratory bottles. However, most of the commercially available screw closures do not provide a seal that is reliability impermeable to gases and water vapor. Therefore we have developed the new DURAN® stoppers from a high-purity bromobutyl rubber elastomer. Bromobutyl rubber is a well-understood material that is essentially impermeable to most gases, including water vapor, and maintains controlled conditions inside the glass bottle.

Alistair Rees, DURAN product manager at DWK Life Sciences commented: “The new GL 45 stoppers meet the critical requirements of many high demand applications such as in anaerobic microbiology, or for the long-term storage of moisture or air-sensitive substances.”

In addition, the soft elastic bromobutyl rubber is reliably self-sealing supporting multiple needle punctures, providing secure access for sampling, or gas purging. Perfect for applications requiring gas purging or sample transfer via a syringe needle.

The stopper shape and dimensions have been carefully optimized for a perfect fit to the GL 45 neck. This means that it is usable with the full range of DURAN® GL 45 bottles that range in size from 100ml up to 20 Liters.

For more information, please visit: