LLG Labware 20 mm Combination Seal, Aluminium Headspace Cap, Clear Lacquered, Centre Hole, Pharma-Fix Septa Butyl/PTFE, 50° Shore A, 3.0 mm

The LLG Labware 20 mm Combination Seal, with aluminium headspace cap, clear lacquered finish, and centre hole, is designed for secure vial closure in headspace and analytical applications where reliable sealing and sample integrity are critical. Featuring a Pharma-Fix septa made from butyl with a PTFE layer, this combination seal supports consistent performance in demanding laboratory workflows, including gas chromatography and headspace analysis. The centre hole design enables convenient syringe access while maintaining a secure seal during repeated use.

Key Features:

• Brand: LLG Labware
• Designed for 20 mm headspace vials: Suitable for use with standard 20 mm headspace vial systems, supporting secure and reliable closure in analytical and GC applications.
• Aluminium headspace cap with clear lacquered finish: Provides a durable and stable closure, with the lacquered surface offering additional protection and consistent handling performance.
• Centre hole for direct septum access: Allows syringe penetration without removing the cap, supporting efficient sample injection and extraction in analytical workflows.
• Pharma-Fix septa Butyl/PTFE construction: Combines the low permeability of butyl rubber with the chemical resistance of PTFE, making it suitable for headspace and solvent-based applications.
• 50° Shore A hardness: The septum hardness is optimised for reliable puncture and resealing, helping maintain sample integrity during repeated injections.
• 3.0 mm septum thickness: Provides enhanced sealing performance and durability, particularly suited to headspace applications requiring consistent barrier properties.
• Suitable for GC and headspace analysis: Designed for analytical workflows where gas-tight sealing and reliable septum performance are essential.
• Helps reduce leakage and contamination: The cap and septum assembly supports secure sample containment, helping minimise evaporation, contamination, and sample loss.

The LLG Labware 20 mm Combination Seal is a dependable choice for laboratories requiring high-performance vial closures for headspace and analytical applications. When you order through LabFriend, you gain access to trusted laboratory consumables, dependable sourcing, and support in selecting the right vial accessories for your workflow. Choose LabFriend for closure solutions that help maintain sample integrity, support accurate analysis, and improve laboratory efficiency.

Frequently Asked Questions

1. What type of vials is this combination seal designed for?
It is designed for use with standard 20 mm headspace vials.

2. What is the benefit of the centre hole design?
The centre hole allows direct syringe access through the septum without removing the cap, improving workflow efficiency.

3. What materials are used in the septum?
The septum is made from butyl rubber with a PTFE layer, providing chemical resistance and low permeability.

4. What does 50° Shore A indicate?
It refers to the hardness of the septum, balancing puncture ease with reliable resealing performance.

5. What applications is this product suitable for?
It is suitable for headspace analysis, gas chromatography, and other analytical laboratory workflows requiring secure vial closure.