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Zemseal® waterproofing membrane cleaning


The waterproofing membrane must be able to withstand cleaning before the concrete is poured, which is an important factor in the selection process. Zemseal® has been extensively tested for cleaning behaviour.

Contamination by soil, cement, leaves, ice, etc. will cause bonding problems with all fresh concrete membranes and should therefore be avoided. However, in many cases this is not possible in the construction process. Only when the contamination has been removed, can the reliability of the entire system and thus permanent water impermeability be guaranteed.

With Zemseal® sub-structure waterproofing system, the types of soiling and cleaning described above do not damage the composite layer, so that backflow safety is still ensured without restriction.

Zemseal® sub-structure waterproofing system has been extensively tested for cleaning behaviour.

The following test criteria were applied to the product Zemseal® :

Type of contamination:

  1. A wet clay-sand mixture was rubbed most into the composite layer and dried for seven days.
  2. Zemseal® was exposed for twelve weeks on the composite layer side to the usual site conditions. Dust and dirt were introduced during this period by daily foot traffic.
  3. Site concrete was applied to the composite layer and cured for three days.

The successful cleaning with various high-pressure cleaners was carried out without leaving any residues:

  1. A wet clay-sand mixture was cleaned with a wide jet nozzle
    pressure: 70 bar – nozzle distance: 100 mm to 200 mm
  2. Contamination from the construction site was successfully cleaned with a wide jet nozzle or rotating nozzle
    pressure: 140 bar to 190 bar – nozzle distance: 100 mm to 200 mm
  3. Site concrete in cured condition with a rotating nozzle (milling nozzle)
    pressure: 170 bar – nozzle distance: 100 mm to 200 mm

August 2020


Cleaning demonstrated in the video:

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Contact Contact

+49(0) 9427 189-0

Max Frank GmbH & Co. KG
Mitterweg 1
94339 Leiblfing