PTFE Milled Envelopes/ Bore Liners

PTFE envelopes (or bore liners) are available to fit 1.5 and 3.0mm thick gaskets, and to suit the range or bore sizes.

PTFE is a relatively expensive gasket material. However, a PTFE liner can be fitted to the bore of a standard gasket to increase its chemical resistance. Such a bore liner is known as a PTFE envelope.

PTFE (Polytetrafluoroethylene) is an inert material and so has excellent chemical resistance. It is mainly used in the presence of aggressive chemicals: such as acids, bases, and solvents.

If you can’t find what you are looking for, or require a bespoke part, please do not hesitate to contact us.

We are quality assured to ISO 9001:2008, and ISO 14001: 2004.


Customer Service

We are happy to answer any questions that you might have about this product. Please contact us for more information.


Orders are processed as quickly as possible and are dispatched on a next day U.K. carrier, or by first-class post. Please allow a few days for delivery of your order.

International deliveries can be arranged for you. Additional shipping costs can be quoted on request.

Returns Policy

While every effort will be made to fulfil your order correctly, if for any reason you do not receive the correct goods then please contact us and we will be happy to correct your order.