Plates for air duct stiffening must be sealed in order to avoid leakages caused by the internal reinforcement system. The conventional method using sealing compound, e.g. Gebhardt-MAXX, is time-consuming and cost-intensive.

With our seals for duct reinforcement, we can offer a simple, fast and cost-effective way to securely seal the reinforcements.

The Gebhardt-Stahl seals must simply be placed between the plate and duct wall. When screwing, the seals are compressed and in doing so, reliably and permanently seal the area of the drilled hole. The seals are available in two sizes, which makes them suitable for different screw sizes.

Sealing for air duct stiffening

  • Sealing M6

    Sealing M6

    • Art. no.: 313220010
    • Material: HDPE
    • For threads M6
    • PU 1.000 pcs
    Gebhardt-Stahl GmbH
  • Sealing M 8

    Sealing M 8

    • Art. no.: 313220020
    • Material: HDPE
    • For threads M8
    • PU 1.000 pcs
    Gebhardt-Stahl GmbH





For all queries please don´t hesitate to contact us. We look forward to hearing from you.

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Gebhardt-Stahl GmbH

We have been manufacturing cold-rolled metal sections in Werl for more than 30 years. We’re an innovative medium-sized enterprise and focus on the production of steel reinforcement sections for PVCu windows, HVAC components, steel vineyard stakes and bespoke profiles.


Gebhardt-Stahl GmbH

Runtestraße 33
59457 Werl

+49 (0) 29 22 / 97 33 - 0

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