Wood preservatives

Wood preservatives for preventive treatment are used to prevent infestation of wood and wood-based materials by insects, fungi and other wood-destroying organisms.

Wood preservatives for curative treatment are used to combat infestation of wood by destructive fungi and insects, including the treatment of masonry against dry rot.

Regulatory framework

DIBt grants national technical approvals (abZ) / general construction technique permits (aBG) for wood preservatives without biocidal agents as long as they are not covered by Technical Building Rules or generally recognised technical rules.

Wood preservatives containing biocidal agents fall within the remit of the Federal Institute for Occupational Health and Safety (BAuA)

Application forms

National procedure

A national technical approval (abZ) and/or oder general construction technique permit (aBG) is granted upon application (see Model Building Code (MBO), Sections 16a(2) and18(2) and (4)). This also applies to amendments and supplements to, or renewals of existing approvals and/or construction technique permits.

No formal requirements apply. The following information is needed: name and address of the applicant, description of the product and/or construction technique and its field of use or application, type of decision required (new decision, amendment or supplement to, or renewal of, an existing decision).

Please feel free to use the template below.

Application for a national technical approval and/or construction technique permit (3 pages)

Version: January 2018; Application form

Application for amendment / supplementation / renewal of a national technical approval and/or construction technique permit (4 pages)

Version: January 2018; Application form

Guideline: How to provide drawings for national technical approvals and general construction technique permits (5 pages)

Version: July 2017

  • abZ/aBG
  • Z = new decision | E = supplement | Ä = amendment | V = renewal | G = valid until
    Subject concerned Applicant Decision no. Validity
    from / to
    Holzschutzmittel impralit-KDS-B

    RÜTGERS Organics GmbH

    Oppauer Straße 43

    68305 Mannheim

    Z-58.1-1361 Z: 04.04.2016
    V: 01.08.2017
    G: 10.08.2022
    Holzschutzmittel Korasit KS

    Kurt Obermeier GmbH & Co. KG

    Berghäuser Straße 70

    57319 Bad Berleburg

    Z-58.1-1423 Z: 22.03.2017
    G: 05.03.2022
    Holzschutzmittel impralit-KDS 4

    RÜTGERS Organics GmbH

    Oppauer Straße 43

    68305 Mannheim

    Z-58.1-1428 Z: 05.03.2018
    G: 18.03.2023
    Holzschutzmittel impralit-TSK 10

    RÜTGERS Organics GmbH

    Oppauer Straße 43

    68305 Mannheim

    Z-58.1-1589 Z: 10.01.2017
    G: 10.01.2022
    Holzschutzmittel Korasit® KS-M

    Kurt Obermeier GmbH & Co. KG

    Berghäuser Straße 70

    57319 Bad Berleburg

    Z-58.1-1656 Z: 22.01.2015
    V: 23.03.2017
    G: 05.03.2022
    Holzschutzmittel Korasit® KS2

    Kurt Obermeier GmbH & Co. KG

    Berghäuser Straße 70

    57319 Bad Berleburg

    Z-58.1-1666 Z: 23.03.2017
    G: 05.03.2022
    Holzschutzmittel Korasit® TT 25 P

    Kurt Obermeier GmbH & Co. KG

    Berghäuser Straße 70

    57319 Bad Berleburg

    Z-58.1-1676 Z: 23.03.2017
    G: 23.03.2022
    Holzschutzmittel Korasit TT 40 P

    Kurt Obermeier GmbH & Co. KG

    Berghäuser Straße 70

    57319 Bad Berleburg

    Z-58.1-1680 Z: 23.03.2017
    G: 23.03.2022
    Holzschutzmittel impralit-KDS

    RÜTGERS Organics GmbH

    Oppauer Straße 43

    68305 Mannheim

    Z-58.1-1685 Z: 11.05.2018
    G: 11.05.2023
    Schwammsperrmittel Korasit MS zur Bekämpfung von Hausschwamm im Mauerwerk

    Kurt Obermeier GmbH & Co. KG

    Berghäuser Straße 70

    57319 Bad Berleburg

    Z-58.2-1503 Z: 17.01.2017
    G: 01.02.2022
    Holzschutzmittel Koranol IB mit bekämpfender Wirksamkeit

    Kurt Obermeier GmbH & Co. KG

    Berghäuser Straße 70

    57319 Bad Berleburg

    Z-58.2-1684 Z: 21.02.2017
    G: 21.02.2022
    Schutzmittel "Koratect MSOB" für bauliche Bekämpfungsmaßnahmen zur Verhinderung des Überwachsens von "Echtem Hausschwamm" von Mauerwerk auf Holz

    Kurt Obermeier GmbH & Co. KG

    Berghäuser Straße 70

    57319 Bad Berleburg

    Z-9.1-894 Z: 24.01.2020
    G: 24.01.2025

Anja Dewitt
Head of Section – Timber Construction

Phone +49 30 78730-317
Email adw(at)dibt(.)de

Legal reference documents

Testing, certification, inspection