bespoke fabrications

welding & sealing of ptfe, fep & PFA


We have years of experience in welding fluoropolymers and the most commonly sealed materials are PTFE, FEP and PFA.


With our specialist techniques we can produce very specific tip profiles for applications where smoothness, clarity and thickness are critical to the performance of the device.

FEP and PFA can be re-formed to a solid or hemispherical tip where the wall thickness remains a consistent size over the whole tip area. These can be push fit tubes or heat shrinkable. We can offer this service on all the fluoropolymer tubes we stock and custom sizes can be made to order.


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Tubing Specifications

FEP and PFA tubes can also be tapered to reduce the tip diameter before it is sealed.

PTFE tubes can have a plug welded into the tube using a bespoke technique ensuring a leak proof seal.

Sealed tubes can currently be made in lengths up to 6 metres.

Welding & Sealing Techniques

To produce closed end or tipped tubes and profiles, we have a technique for producing a 3-dimensional seal. All our sealed parts are either spark or air tested to ensure the integrity of the seal.

Our welding equipment is custom-built in-house, as fluoroplastics are extremely difficult polymers to process and often ‘off-the-shelf’ machinery is not suitable.

We have two linear welding machines that are used to produce flat welds such as those needed to produce gas sample bags and boots for shatterproofing UVC and UVA lamps.

In addition to our fluoroplastic welding equipment, we have several High Frequency (HF) welders for sealing PVC and PU films for none critical applications. These are a more cost-effective solution to our standard fluoropolymer gas sample bags.

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Case study: Custom bags for racing seat components

Our R&D engineers worked with a local company to produce custom fit racing seats. The seats can be fitted or enthusiasts can buy the kits to create their own bespoke racing seats.

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Case study: Large capacity gas sample bags for VOC testing project

We supplied Tedlar® bags for VOC testing of in-cabin automotive components. These needed to be tested for volatile organic compounds (VOC's) and carbonyl traces at elevated temperatures.

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Case study: FEP chamber for environmental monitoring

A project we worked with the University of Manchester involved producing a single-unit, one-off FEP sample chamber for an environmental monitoring project.

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Every application is different and our technical team love a challenge, so get in touch today to discuss your requirements:

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