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Manhole gasket

A manhole gasket seals amongst others: manhole lids and hand-hole lids. This gasket is usually made out of rubber. The manhole seal can be applied in steam boilers and vessels in power plants, chemical plants and greenhouses. But also in the maritime industry and aviation. Ridderflex accurately cuts or die cuts manhole gaskets according to your drawing or model.

Manhole seal: various materials

We supply manhole gaskets in the following materials:

RubberOur rubber manhole gaskets can be produced out of any desired rubber grade. The gaskets can be supplied in different shapes. Also in large dimensions. The manhole seals are suitable for various applications, such as the maritime and offshore industry. But also in heated water installations, dryers and hot air systems.
Flangiflon (PTFE)The material of this gasket has a unique fiber structure. This provides both an exceptionally good chemical resistance and temperature resistance. The material is steam-resistant which makes these gaskets perfectly suitable for use in steam boilers. Our Flangiflon manhole seal is endless.
GraphiteThis gasket is made out of braided expanded pure graphite without binders and fillers. This gasket excels in applications with high temperatures(up to 450°C). The material also has a high chemical resistance. This gasket is also endless.

Our specialists are happy to advise you by choosing the proper material. Please contact our sales department.

Digital cutting

One of the most advanced machines is our digital cutting and milling machine(CNC). This digital cutting plotter enables us to cut your manhole gasket out of rubber sheeting material according to your drawing or model. Would you like to send us a digital drawing? No problem! The file formats *.dxf, *.dwg and *.stp can be imported into our digital cutting plotter. View the full list of file formats we can import into our machine.

Die cutting

If you order large product quantities it might be interesting to die cut gaskets. And because we manufacture our own dies, we can produce large product series with short delivery times.

Customised gasket

Ridderflex supplies high-quality customised manhole gaskets. This can be based on your drawing or model. We are happy to advise you about the possibilities. Please call +31 (0) 180 46 34 71 or send us an e-mail.

Related to manhole gaskets

  • Digital cutting and milling (CNC)

    Digital cutting and milling (CNC)

    One of our most advanced machines is our digital cutting and milling machine. This cutting plotter enables us to cut and mill any shape required.

  • Die cutting

    Die cutting

    With our die cutting machines we manufacture products such as die cut gaskets, die cut rings and die cut sealing products to the right dimensions.


ISO including co-engineering

Ridderflex complies with international quality management requirements. We are now also certified for co-engineering – our strength – . Read more


Any questions about products or make an enquiry? Simply call us or send us an e-mail. +31 (0) 180 46 34 71