A new type of airtightness seal: spray-on or brush-on liquid film from pro clima

This innovative product impresses with its wide range of possible applications

Spraying instead of sticking: AEROSANA VISCON can be used to create a new type of vapour retarder and airtightness seal.

Who says that airtightness films always have to come as sheeting in roll form? With AEROSANA VISCON, there is now a liquid vapour retarder and airtightness layer than can be sprayed directly onto surfaces to be sealed. When it dries out, the acrylic dispersion turns into a durable, seamless elastic protective layer. Suitable subsurfaces include non-plastered masonry, porous panel-form materials and membranes too. With its humidity-variable sd value, AEROSANA VISCON is suitable for interior air sealing and also for protected outdoor areas. The spray film is water-based and has achieved excellent values in the hazardous substance test. Continue reading

Moisture-variability – what it is and how it works

pro clima clients ask – pro clima engineers answer

Moisture-variable vapour retarder membranes are able to adapt their diffusion resistance to the time of year in an optimal manner. As a result, they are more closed to diffusion in winter and can thus protect building components against moisture penetration. In contrast, they are open to diffusion in summer and thus ensure the best possible conditions for drying to the inside.

Moisture-variable membranes react to the humidity of the surrounding air
The moisture of the surrounding air is around 40% on average in wintertime for a vapour retarder installed on a building component in the case of typical usage of the building as a home. This is relatively dry.
Nonetheless, the diffusion flow is from the warm indoor space, through the building component and towards the outdoor air, which is cold and effectively even drier. A high vapour resistance on the inside of the building component inhibits or stops the movement of moisture that would condense along its route towards the colder outer layers, and in this way the structure is protected against the condensation that would otherwise form. Continue reading