Sealing slurry and bitumen - double protection

Sealing slurry and bitumen serve the same purpose, namely the sealing of walls, floors or roofs against moisture. Both have different properties, but can also complement each other if necessary. Why, read here.

What are both used for??

Moisture in the walls leads to salt efflorescence and ultimately to flaking plaster. Sealing slurry or bitumen help in new buildings or renovations to protect walls and floors from moisture.

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While sealing slurry is mainly used indoors, bitumen is the best protection for outdoor use. In the interior, this can be in the basement as sealing slurry for the floor slab as well as the sealing slurry under the bathroom tiles.

Bitumen is mostly used for external sealing of masonry, for sealing base areas, roofs or building parts that are later filled with earth.

What properties are different?

Properties bitumen waterproofing slurry
Open to diffusion Yes No
Crack bridging No Yes

Why apply sealing slurry and bitumen?

The use of both sealing systems offers a good possibility of an additional seal. With a combination of a bitumen coating and the application of a sealing slurry, you can effectively seal your building. This gives you a very high level of protection in order to repel penetrating moisture.

Sealing slurries are suitable for:

  • concrete
  • Cement plaster
  • Masonry

Make sure that the subsurface is stable. Cracks and joints must be repaired before application. Processing with a wire brush or a sandblasting device improves the later adhesion.

Process the sealing slurry according to the manufacturer's instructions and apply it in two layers. Let each individual layer dry well, then the bitumen can be painted.

Tips & Tricks Normally, the outside area that comes into contact with the earth is sealed with bitumen, while the splash water area at the base is given a mineral sealing slurry. The transition between the two systems is a weak point. A 2-component product, such as the Multi-Baudicht 2K from Remmers, which combines the properties of bitumen and a mineral sealing slurry, can help.