Construction products detail

Joint seals for elements, e.g. made of waterproof concrete

Joint seals are mainly used for elements made of waterproof concrete in accordance with the DAfStb guideline on waterproof concrete structures to seal the joint against soil moisture as well as pressurised and non-pressurised water in areas in contact with soil.

In reinforced concrete construction, joint seals are used to seal construction, control and expansion joints. Furthermore, joint seals can also be used for joints and connections between waterproof concrete systems or elements (e.g. basement light shafts) and surface seals (e.g. PMBC/membranes) of exterior elements in contact with soil.

There are internal and external joint sealing systems with different design principles (e.g. swelling, clamping, adhesion, binding, injection).

Regulatory framework

Joint seals that are not already covered by DIN 18533, DIN 18197 in conjunction with DIN 18541 or DIN 7865 are subject to a national technical test certificate (abP), cf. MVV TB, Section C 3. National technical test certificates are issued by testing laboratories officially recognised for this purpose, as listed in the Directory of recognised testing laboratories, inspection and certification bodies (PÜZ-Verzeichnis see column on the right). The testing laboratories also carry out the corresponding testing and external surveillance. Please submit your application directly to a qualified testing laboratory.

As a European Technical Assessment Body, DIBt can also issue European Technical Assessments (ETAs) for joint sealing products based on European Assessment Documents (EADs) still to be developed or already existing, such as

  • EAD 320002-xx-0605 Coated metal water stop sheet for construction and controlled crack joints in waterproof concrete
  • EAD 320008-xx-0605 Swellable joint sealing tape on the basis of different materials for construction joints in watertight concrete
  • EAD 320014-xx-0605 Joint sealing profile made of EPDM for the sealing of joints in tubbing constructions

The application rules for joint sealing with these products are set out in MVV TB, Section B 2.2.5.

European Technical Assessment (ETA)

To start the ETA procedure, please submit the form below. We will then check if the prerequisites for issuing an ETA are met, i.e., in particular, if the product is not fully covered by an existing harmonised standard. If the prerequisites are met, we will check whether a European Assessment Document (EAD) covering the requested assessment scope already exists or still needs to be developed. If an EAD needs to be developed or amended, a complete technical file needs to be established before the procedure can begin.

Subject concerned Applicant Decision no. Issued on
PENTAFLEX KB, PENTAFLEX KB Plus, PENTAFLEX FTS, PENTAFLEX OBS, PENTAFLEX ABS H-Bau Technik GmbH Am Güterbahnhof 20 79771 Klettgau-Erzingen DEUTSCHLAND ETA-15/0003 13.01.2015
Wolfseal KB 16, Wolfseal FTS, Wolfseal OBS Roland Wolf GmbH Grosses Wert 21 89155 Erbach DEUTSCHLAND ETA-15/0348 05.03.2021
WFP sealing element and controlled crack element WFP GmbH Drescherstraße 49 71277 Rutesheim DEUTSCHLAND ETA-15/0792 13.10.2017
FraDiflex metal water stop Max Frank GmbH & Co. KG Mitterweg 1 94339 Leiblfing DEUTSCHLAND ETA-15/0914 07.03.2016
CEMflex VB, CEMflex VB NG, CEMflex VB Abschalblech BPA-GmbH Behringstraße 12 71083 Herrenberg-Gültstein DEUTSCHLAND ETA-16/0601 20.07.2016
MASTERSTOP bentonite swelling tape 25 x 20 mm MASTERSTOP bentonite swelling tape 20 x 15 mm MASTERSTOP LONG TIME MASTERTEC GmbH & Co. KG Im Maintal 13 96173 Oberhaid DEUTSCHLAND ETA-16/0735 13.09.2016
"Dichtblech VB" MASTERTEC GmbH & Co. KG Im Maintal 13 96173 Oberhaid DEUTSCHLAND ETA-17/0550 19.12.2019
FLOWSTOP MASTERTEC GmbH & Co. KG Im Maintal 13 96173 Oberhaid DEUTSCHLAND ETA-18/0304 18.06.2018
QUICK WU-B aktiv Quick Bauprodukte GmbH Westendamm 3 58239 Schwerte DEUTSCHLAND ETA-18/0828 21.11.2018
Aquafin-CJ5 SCHOMBURG GmbH & Co. KG Aquafinstraße 2-8 32760 Detmold DEUTSCHLAND ETA-18/1106 04.04.2019
M80296 Rio Lomas Dätwyler Sealing Technologies Deutschland GmbH Eisenacher Landstraße 70 99880 Waltershausen DEUTSCHLAND ETA-19/0521 11.10.2019