Plastic seals

Below you will find an overview of our plastic seals

Plastics are materials that can be divided into three main groups

depending on the respective mechanical-thermal properties and the resulting usability: thermosets, thermoplastics and elastomers.

PTFE seals


PTFE is the abbreviation for polytetrafluoroethylene, an unbranched, linear and semi-crystalline polymer made from the elements fluorine and carbon and is generally a white and odorless solid that belongs to the group of thermoplastics.
Further information about
PTFE seals ❯

Polyurethane seals


Polyurethane, also abbreviated as PU or PUR, belongs to the group of urethane plastics and can be found as both a foam and a hard plastic. PU is used in industrial environments as a roller or sealing material.
Further information about
Polyurethane seals ❯

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Plastic gaskets from Rehm Dichtungen

Thermoplastics (e.g. PTFE) can be deformed as often as desired, whereas thermosets (e.g. silicone) are subject to an irreversible reaction when they harden and cannot be deformed again. Elastomers are flexible, can change their shape for a short time and then return to their original shape. Polyurethane (PU) can be assigned to all three plastic groups, depending on the degree of cross-linking.

At Rehm Dichtungen Ehlers GmbH, you have the choice of various technical thermosets and thermoplastics in stock, each with different qualities for the production of individual seals. You are welcome to commission us to produce your planned seals or you can order blanks or material rolls of the selected plastics from us. Contact us and discuss your upcoming sealing project with us.

FAQ on plastic seals

1. what are plastic seals?
Plastic gaskets are seals, such as flat gaskets, which are made of various plastics and can be used to seal joints.
2. which gasket materials belong to plastic gaskets?
There are various types of plastics that can be used to manufacture plastic gaskets. Common types of plastic are polyurethane (PU) and polytetrafluoroethylene (PTFE). The choice of the appropriate material depends on the type of application, the required properties and other factors.
3. how are the plastics processed?
For the production of customized gaskets, different manufacturing processes are available depending on the tolerance specifications and the required quantities. At Rehm Dichtungen Ehlers GmbH, we can resort to waterjet cutting, plotting and punching for the production of your flat or flange gaskets.
4. can plastic seals also be equipped with self-adhesive?
To simplify assembly, most seals made of plastics can be produced with self-adhesive on one side. In principle, bonding the elastomer to the self-adhesive film does not impair the properties of the base material.
5. where are the data sheets and approvals of the sealing materials?
The data sheets and approvals of all standard plastics in stock can be found in our download area under the Service tab. At the same time, you will find an overview of further certifications, such as the REACH and RoHS certifications.