Additional product ranges / Sealing technology


Efficiently and permanently seal holes.


High performance, low cost

Reliable and reproducible with SEALING PLUG plug seals.

In many applications, hydraulic or gaseous media flows through channels and holes. For manufacturing reasons, these are drilled from the outside and then have to be resealed. SEALING PLUG models can be used here because they can withstand operating pressures of up to 500 bar.

Method / principle

The SEALING PLUG is a two-part all-metal component which works according to the push/pull expansion principle. It is used to permanently close and seal holes in pneumatic and hydraulic components and systems.


SEALING PLUGS can be used to control and regulate all kinds of flow. Typical applications include, for example, motors, power and drive trains, chassis and brake systems, steering and injection components as well as various hydraulic applications.

Product benefits
  • Permanent closure and sealing of holes
  • Up to 500 bar operating pressure
  • Easy installation
  • No tapping or reaming of holes required
  • Use of additional sealants not required
  • Process reliable and reproducible

Product benefits

There are many good reasons for using our products.

Strength and options.
Point by point.

Reliable fitting

Fixed parameters allow simple, controlled and reproducible installation, guaranteeing reliable performance even under high pressure.

Process cost savings

Easy installation in the existing drill hole. No need for thread cutting or the use of additional sealants.

Large and small-scale production

The right solution for every area of application. From hand-operated setting tools and pneumatic setting tools to fully automatic systems.

Innovative products

The PULLPLUG™ is the result of continuous product development. It offers many advantages compared to previous SEALING PLUG models.

Detailed description


Simply sealed!

SEALING PLUG models with a ball function according to the push-expansion principle. The ball is pushed into the sleeve, causing it to expand. SEALING PLUG models with a mandrel and PULLPLUGS™ function according to the pull-expansion principle. The mandrel / pin is pulled into the sleeve, causing it to expand. All versions of the SEALING PLUG feature serrations on the outside of the sleeve, which embed the SEALING PLUG in the installation material as it expands.

The easy installation into the existing drill hole makes this method particularly efficient as there is no need to cut a thread. Furthermore, additional sealants are not required.

SEALING PLUGs can be used to regulate and control all types of flow as they can withstand operating pressures of up to 500 bar.

Below you will find an overview of our standard range, other products and dimensions are available on request. Material combinations of aluminium and V4A stainless steels are also available.

Product variants

Every project deserves a tailor-made solution.

Learn more about the product types and find the right variant for your particular application.

SEALING PLUG with ball
– series 11

Available in diameters from 3 mm to 22 mm.


SEALING PLUG with ball
– series 31

Available in diameters from 3 mm to 22 mm.


SEALING PLUG with ball
– series 33

Available in diameters from 3 mm to 22 mm.


SEALING PLUG with mandrel
– RS series

Available in diameters from 4 mm to 10 mm.


– RST series

Available in diameters from 6 mm to 22 mm.



Find out more: related downloads.

If you would like to know more, simply download the relevant brochures.

Title Language Version File Download
Efficient sealing of holes
English 02/2020 253 kB / PDF
English 02/2020 253 kb / PDF

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