Sprayable/brush applied airtight liquid membrane
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Aerosana Visconn is a highly flexible liquid-applied air barrier. As a water-based acrylic dispersion sealant it can be brushed, rolled or sprayed on as a liquid film. Once dry it forms a seamless, elastic, airtight and humidity variable membrane for filling gaps up to 3mm. Larger gaps can be filled with Visconn Fibre.
Primarily used indoors on brick and blockwork to seal porous surfaces and prevent air leakage. It is a viable lightweight alternative to the traditional means of airtightness on masonry buildings where a two coat plaster system would be used. Aerosana Visconn can be combined with vapour open racking boards such as Elka Strong Board in lightweight timber frame buildings to maintain the building's vapour movement. It can also be used in conjunction with CLT buildings and used externally if in a sheltered location.
The 600ml foil cartridges are specifically designed for use with Pro Clima Aerofixx Applicator Gun. Although the cartridge will fit in a typical 600ml extrusion gun, the consistency is unsuitable for this type of applicator and its nozzle. We would recommend brush application of Aerosana Visconn if you are using 600ml cartridges without an Aerofixx Applicator Gun.
Aerosana Visconn liquid membrane creates an airtight film to seal the porous air permeable substrate it is being applied to. Once dried it provides a robust, permanently elastic fully airtight layer, while allowing for the movement of harmful levels of moisture with its humidity variable properties. It sticks to all standard construction materials, all Pro Clima membranes and membranes made from aluminium and paper.
Aerosana Visconn airtight membrane is sprayed or brushed on in several coats in order to fully seal pores of the substrate to which it is being applied. Once dried Aerosana Visconn creates a film over the substrate it has been applied to and renders the areas air tight but still with a high degree of flexibility for future movement, something not achievable with the use of plaster or even airtight tapes and membranes. Aerosana Visconn Black has a blue colour when wet and will turn black once it is dried. The white version is the same colour when wet or dry.
The 600ml foil cartridges of Aerosana Visconn can be loaded into Pro Clima's Aerofixx Applicator Gun. This applicator gun uses compressed air to spray apply Aerosana Visconn or apply it as a bead.
Where gaps are greater than 3mm in width, it is recommended to use Aerosana Visconn Fibre; this can seal gaps of up to 20mm in width and is applied by brush and can also be applied via Aerofixx Applicator Gun.
The wide range of movements that are common in buildings especially during the drying out phase such as issues of cracked plasters can negatively affect the airtightness of buildings as they dry and settle. Due to Aerosana Visconn’s impressive elasticity, the flexibility of the dried material is of significant benefit and offers an impressive range of movement without compromising its robust airtightness properties.
Aerosana Visconn is third party tested by the IFT Rosenheim as a suitable airtight weather resistant material for use in critical window and door junction areas, and has been verified and certified by the renowned Passivhaus Institute.
Aerosana Visconn White can be used when the sealed area will remain visible and/or needs to blend in with other lightly coloured painted surfaces. Also useful in situations where light colours are a health and safety requirement (e.g. in a lift shaft).
Pro Clima provide a limited system warranty, backed-up with public liability insurance, for all airtightness system, roof and wall sealing system and construction products that they supply. A 10-year warranty is provided for these products when correctly installed in combination with approved thermal insulation materials and other Pro Clima system products. When correctly installed in combination with other manufacturers’ products (not made by Pro Clima), a 6-year warranty is provided.
ISO 16000 hazardous substance compliant.
Application temperature (range): 5 °C to 60 °C
Temperature Resistance: -40 °C to 90 °C
g-value (humidity variable): 0.65 MNs/g to 50 MNs/g
sd-value: 6 m
sd-value (humidity variable): 0.13 m to 10 m
Aerosana Visconn can be sprayed, brush or rolled onto the surface to be made airtight. Depending on access and the size of the area needing to be sealed the liquid barrier can be applied in various ways.
Smaller and difficult to reach areas typical in retrofits can often be easily sealed with a brush. Timber joist end details, areas around wall plate at eaves levels as well as junctions around services and electrics can be sealed by brush for a quick drying lightweight airtight solution.
Larger areas of masonry can be sealed effectively using an appropriate spray machine. Areas such as fair faced blockwork in schools or gymnasiums can be coated to effectively seal the porous substrate while maintaining the features and shaped outline of the masonry behind.
For these larger areas the speed of application as well as the significant reduction in the onsite drying time and labour involved with the liquid applied air barrier leads to a much easier, cost effective solution over that of a traditional plastered system.
If Aerosana Visconn is applied externally care should be taken to ensure adequate protection is provided against the elements, in particular the rain. Application to frozen surfaces is not possible, and there must be no water-repellent substances (e.g. grease or silicone) on materials to be sprayed.
Aerosana Visconn is capable of covering gaps, cracks and joints of up to 3 mm width. Cracks or pores larger than this 3mm can be sealed using Aerosana Visconn Fibre, capable of sealing gaps of up to 20mm wide.
Porous or rough blockwork should be assessed prior to application and adequate coverage applied to ensure the full filling of pores to achieve superior air leakage results.
Optimum coverage is generally achieved when a layer is first sprayed on horizontally and then sprayed over vertically in a cross pattern.
Aerosana Visconn and Visconn Fibre 600ml foil cartridges are specifically for use with a Pro Clima Aerofixx Spray applicator gun. Aerofixx is ideal for spraying smaller areas and for quick airtight sealing of tricky details.
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