Waterproofing and decoupling membranes for interior and exterior use
There are various advantages to decoupling wall or floor coverings, e.g. made of ceramic or natural stone, from the substrate by installing a plastic sheet with a laminated fleece as a separating layer. Tension and movement in the substrate caused by temperature fluctuations or rapid dehydration can be bridged by the decoupling membranes. They prevent the tension from being transferred to the top layer. In addition, during building renovation, they can be laid without any problems on poorly adhering and critical substrates such as old ceramic or wooden floors.
Depending on their structure, many decoupling membranes can also be used as sealing membranes. For example, as a moisture barrier on floor slabs in contact with the ground, as a vapor barrier on floor slabs above rooms subject to high structural loads, or as a sealing layer in outdoor areas under tiled balconies and terraces.
In addition to these multifunctional membranes, CaPlast offers a wide range of other sealing membranes for damp rooms such as bathrooms and showers or kitchens, including the appropriate accessories. Our wide range of customized sealing membranes, deep-drawn corners, and sealing collars have been tested in accordance with AIV ETAG 022 and have been awarded general building inspection certificates (AbP). If these can be adapted, we will be happy to provide them. Otherwise, we will of course take care of obtaining them.

Possible areas of application for CaPlast sealing and decoupling membranes
- Floor slabs in contact with the ground (DIN 18533)
- Concrete ceilings against residual moisture during the setting process
- Floor slabs as vapor barriers
- Damp and wet rooms
- Balconies and terraces
- Wall and floor areas
- Ceramic floor coverings
- Heated and unheated screeds
- On existing ceramic/natural stone/wood coverings
- Gas barriers such as radon barriers
- Drywall
Configure your geomembranes and decoupling membranes individually
At CaPlast, you can tailor functional properties such as sd value, tear and tensile strength, elongation, water pressure resistance, and temperature resistance precisely to the desired application and target functionality of your sealing membranes and decoupling membranes. Talk to usabout your requirements, and we will do our best to meet them.
Matching system accessories
We offer the right system accessories for all sealing sheets from CaPlast, such as sealing tapes for indoor and outdoor use, inner and outer corners, and sealing collars. Expansion zone collars can be produced in all external dimensions and geometries, with any expansion zone size and any punching diameter on the inside, in accordance with DIN standards.




