Sprayable airtightness sealant with a humidity-variable sd value (g value, permeance), blue/black



  • Time-saving: ready-to-use dispersion
  • Reliable structures thanks to excellent adhesive properties on all standard construction surfaces
  • Covers cracks and joints of up to 3 mm (1/8") width. Larger joints can also be covered in combination with AEROSANA FLEECE.
  • For robust building components: permanent elasticity and high durability once it has dried
  • Improves surfaces: forms a bonding course between subsurfaces and subsequent coatings
  • Can be plastered/painted over, pro clima adhesive tapes can be stuck onto it
  • Flexible use in indoor and protected outdoor areas thanks to its humidity-variable sd value
  • Excellent values in the hazardous substance test, has been tested according to the ISO 16000 evaluation scheme

Areas of Application

For use as a humidity-variable vapour retarder and airtight layer that can be applied as a spray or using a brush on wall, ceiling and floor surfaces, such as non-plastered masonry or porous panel-form materials.

  • Also for the creation of joints to components such as windows, roofs, walls, ceilings and floors.
  • Can also be used for strengthening subsurfaces in the case of renovation.
  • The humidity-variable diffusion resistance of this product means that it can be used on the interior and exterior of building components.

AEROSANA VISCONN is a high-quality, water-based acrylic dispersion paste that can be applied as a spray or using a brush. The sprayed-on liquid film forms a seamless, elastic air-retarding and vapour-retarding protective layer once it has dried.

Photo gallery, Installation

General conditions

Cracks that are wider than 3 mm (1/8") must be stuck over, covered with AEROSANA FLEECE or filled.
The best coverage is achieved when one layer is first sprayed on horizontally and then sprayed over vertically in a cross pattern. Perfect airtightness can only be achieved with a sealed AEROSANA VISCONN film.

Airless application
Airless diaphragm or piston pumps can be used. The throughput of this equipment should not be less than 1.8 litres/min. The recommended nozzles are: 210, 317, 519.
The first digit of the nozzle designation specifies the spray angle x 10°, the second and third digits represent the diameter of the nozzle in 0.0xx inches. Applications with detail features are sprayed using a 210 nozzle, while broad surface applications are carried out using a 519 nozzle.
The pressure is set to ensure a uniform spray finish that is free of streaks. If streaks are visible beside the spray area, increase the spray pressure.
If this does not help, clean or replace the filter. The optimal pressure is around 80-150 bar (1100-2200 psi), depending on the nozzle used.
A mesh size of 60 is recommended for the pistol filter. Stir the material slowly and uniformly before spraying it. Flush the airless device once with clear water and then empty it fully before putting it into service.

Spraying should be carried out at a distance of approx. 20 cm from the subsurface. The best coverage is achieved when one layer is first sprayed on horizontally and then sprayed over vertically in a cross pattern. Application in a number of layers can be carried out without any need for drying periods between them. The required minimum layer thickness of 500 μm (1/32") has been achieved when a seamless, slightly wavy, but non-running surface (‘orange peel’) is formed on the surface of AEROSANA VISCONN during the spraying process. Cracks and pores (up to 3 mm ; 1/8") in the subsurface must be closed with AEROSANA VISCONN by spraying over / flooding them to achieve perfect airtightness.
The thickness should be checked at various points across the entire sprayed surface using the measuring gauge immediately after the last layer of AEROSANA VISCONN has been applied.

AEROSANA VISCONN changes colour from blue to black when it dries. AEROSANA VISCONN white does not change colour. The moist film is to be protected against additional moisture (e.g. rain) until it has fully dried.
Immediately after the spraying work has been completed, the airless device is to be cleaned on the outside with water and flushed a number of times until the flushing water is no longer visibly turbid – completely remove any residues of AEROSANA VISCONN. For additional information (e.g. operating instructions), contact the manufacturer of the airless device.

Protective equipment
If spraying is to be carried out at poorly ventilated locations, wear personal protective equipment consisting of a mask, protective glasses and gloves.

Application with a brush
AEROSANA VISCONN, AEROSANA VISCONN white and AEROSANA VISCONN FIBRE can also be applied conveniently using a brush. To ensure efficient working, the width of the brush should be ≥ 50 mm (2"). Check the minimum layer thickness of 500 μm using a measuring gauge.


Subsurfaces should be cleaned. Application onto frozen subsurfaces is not possible. There must be no water-repellent substances (e.g. grease or silicone) on materials to be sprayed. Subsurfaces must be sufficiently dry and stable.
Application to moist, but not wet subsurfaces is possible.

Before application, check whether the subsurface is suitable for a sprayable film. It may be necessary to apply a number of coats in the case of uneven or shaped subsurfaces. Gaps (pieces broken out of the subsurface) or significant unevenness may need to be closed using AEROSANA FLEECE, stuck over before application (e.g. with one of the CONTEGA SOLIDO adhesive tapes, depending on requirements) or levelled off with filler.

Movement joints cannot be sealed due to the relative motion that can be expected. Transitions such as floor-wall joints are to be coated with the required minimum layer thickness (500 μm wet application) along their entire lengths in the area to be sealed.
If films (e.g. pro clima INTELLO) are to be sealed in an airtight manner, these should be fixed in place using a suitable adhesive tape (e.g. TESCON VANA or CONTEGA SOLIDO SL). The transition must be free of tension.

Protect adjacent materials/surfaces Materials/surfaces beside the areas to be coated should be protected; this applies particularly to visible surfaces such as wood, glass, ceramics, clinker bricks, natural stone, paint/varnish and metal. Wash away any splashes immediately with copious amounts of water. Do not wait until they have hardened.
Clean tools with water immediately after use.
Collect the water used for washing and dispose of it in accordance with official regulations.

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