1000 count - 20mm ETFE Laminated Bromo butyl Rubber Stoppers – Pharmaceutical Grade Serum Vial Closures. 

These 20mm ETFE laminated Bromo butyl rubber stoppers are designed for use with 20mm crimp-top serum vials in pharmaceutical, biotechnology, and laboratory environments. The ETFE (ethylene tetrafluoroethylene) barrier film provides superior protection against chemical interaction, helping maintain the integrity of sensitive samples and formulations.

Manufactured from high-quality Bromo butyl rubber, these stoppers provide an excellent seal while offering low permeability, low extractables, and strong chemical resistance, making them ideal for demanding lab and pharmaceutical applications.

Product Specifications

• Size: 20 mm
• Material: Bromo butyl Rubber with ETFE Barrier Film
• Color: Typically, gray (may vary by lot)
• Compatibility: Designed for 20mm crimp-top serum vials
• Seal Type: Used with 20mm aluminum crimp seals
• Sterilization: Compatible with autoclave sterilization
• Application: Laboratory, pharmaceutical, and research use

Key Features

• ETFE laminated barrier layer helps prevent chemical interaction with contents
• Low extractables and leachable for sensitive applications
• Excellent chemical resistance for laboratory and pharmaceutical use
• Secure sealing performance when used with aluminum crimp seals
• Compatible with freeze-drying (lyophilization) processes
• Reliable puncture performance for syringe needle access

Common Applications

These Bromo butyl stoppers are widely used for:

• Pharmaceutical drug storage
• Laboratory sample containment
• Biotechnology and research applications
• Chemical storage and handling
• Lyophilization (freeze-drying) processes
• Serum and injectable vial closures

Compatibility

These stoppers are designed to fit standard 20mm serum vials and are typically used with 20mm aluminum crimp seals for a secure closure system.

(Serum vials and aluminum seals are sold separately unless otherwise specified.)