Injector septa support secure sealing, needle access, tubing connection and contamination control for laboratory bottles, caps and glassware systems. Source silicone seal septa, vulcanized PTFE insert seals and GL screw-thread sealing components through our Laboratory range, with supply support from Labfriend.
Injector Septa
Injector Septa for GL Laboratory Caps, Tubing and Sealed Access
Injector septa are used to seal laboratory containers while allowing controlled access for tubing, sampling, injection or transfer workflows. This focused category includes silicone seals with vulcanized PTFE inserts, silicone seal septa, GL 14, GL 18, GL 25 and GL 32 thread options, and tubing diameter formats for laboratory bottle and cap assemblies.
- Visible Product Range: Silicone seals with vulcanized PTFE inserts, silicone seal septa and GL thread sealing components for laboratory containers.
- Supported Supply: Available through Labfriend and the wider John Morris Group laboratory supply network.
- Thread Options: Visible options include GL 14, GL 18, GL 25 and GL 32 seal formats for compatible screw-thread caps and bottles.
- Tubing Compatibility: Visible products support tube diameter ranges including 5.5-6.5 mm, 7.5-9 mm, 9-11 mm, 15-17 mm and 17-19 mm depending on seal type.
- Typical Applications: Sample containment, bottle sealing, tubing access, reagent transfer, closed handling, injection access and laboratory vessel connection workflows.
Selecting Silicone Seal Septa and PTFE Insert Seals
Correct injector septa selection depends on the GL thread size, tube diameter, chemical compatibility, temperature exposure and whether the seal must support needle penetration, tubing access or container closure. Silicone provides flexible sealing performance, while PTFE inserts help improve chemical resistance in applications involving solvents or aggressive reagents.
- GL Thread Matching: Choose GL 14, GL 18, GL 25 or GL 32 according to the cap or bottle thread used in the laboratory setup.
- Tube Diameter: Match the seal to the tubing diameter to reduce leakage risk and maintain secure positioning during use.
- PTFE Insert Protection: PTFE inserts help protect the silicone surface from chemical attack and support cleaner contact with solvents or reagents.
- Autoclavable Options: Select autoclavable silicone seal septa where sterilisation or high-temperature cleaning is part of the workflow.
- Application Fit: Confirm whether the seal is intended for tubing connection, injection access, sample containment or general GL cap sealing.
Related Categories for Sealing, Glassware and Liquid Handling
Injector septa are commonly purchased with caps, connectors and liquid handling components used in the same laboratory setup. Buyers may also need Caps or Tops, Laboratory Adapters or Connectors or Fittings or Laboratory Vials for complete containment and connection workflows.
- Laboratory Supplies and Fixtures: Supports routine seals, caps, glassware and accessories used across laboratory benches.
- Laboratory and Scientific Equipment: Relevant for laboratories connecting bottles, vessels, tubing and analytical systems.
- Test and Measurement: Supports technical workflows where sample integrity, sealed transfer and instrument access are important.
Australian Support for Injector Septa Procurement
John Morris Group supports Australian laboratories, research teams and quality control facilities with injector septa, silicone seals, PTFE insert seals and related laboratory sealing components. Established in 1952, ISO 9001 certified and backed by factory-trained engineers, our AU team can help match injector septa to your GL thread size, tubing diameter, chemical exposure and workflow. Contact 1300 501 555 for support.
Frequently Asked Questions
What are injector septa used for?
Injector septa are used to seal laboratory containers while allowing controlled access for tubing, needles or sample transfer. They help reduce contamination and leakage while supporting closed or semi-closed laboratory workflows.
What is the benefit of a PTFE insert in a silicone seal?
A PTFE insert helps protect the silicone from chemical contact and improves resistance to solvents or reagents. Silicone provides flexibility and sealing performance, while PTFE provides a chemically resistant contact surface.
How do I choose the correct GL septa size?
Match the septa to the GL thread size of the cap or bottle, then confirm the tube diameter range, material compatibility and whether the seal needs to be autoclavable or suitable for repeated laboratory use.