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



  • Time-saving: ready-to-use dispersion
  • Reliable structures thanks to excellent adhesive properties on all standard construction surfaces
  • 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


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.

Sticks to all standard construction materials, all pro clima membranes, and membranes made of aluminium and paper.

Technical specs

Material Aqueous acrylic dispersion
Attribute Value Norm
Colour Art.No. 1AR01740: white
Colour Art.No. 1AR01106: Dark blue, when fully dry dark blue/black
Surface weight approx. 200 g/m² ; 0.66 oz/ft² (dried), depending on subsurface and applied thickness EN 1849-2
Coating application 0.2 - 1.0 mm ; 8 - 39 mils - wet film
sd-value 6 ±0.6 m (at 0.3 mm thickness) EN 1931
sd-value humidity variable 0.13 - 10.00 m EN ISO 12572
g-value 30 ±3 MN·s/g (at 0.3 mm thickness)
g-value humidity variable 0.65 - 50 MN·s/g
Vapor permeance 0.54 US perms (at 0.3 mm ; 12 mils thickness) ASTM E96-A
Vapor permeance humidity variable 25.2 - 0.33 US perms ASTM E96-A
Exposure time 3 months
Water column 2 000 mm ; 6' 7" EN 20811
Water resistance W1 EN 1928
Can be plastered/painted over yes and pro clima adhesive tapes can be stuck onto it
Application temperature 5 °C to +35 °C ; 41 °F to 95 °F
Temperature resistance permanent -40 °C to 90 °C ; -40 °F to 194 °F (dried)
Coverage approx. 750 g/m² ; 2.46 oz/ft², depending on applied thickness
Drying approx. 12 - 48 hours (at 20 °C, 65% rel. humidity) depending on subsurface and applied thickness
Storage 5 °C - 25 °C ; 41 °F - 77 °F, dry, in a closed, airtight bucket

Image gallery - Application guide

General conditions

AEROSANA VISCONN can be easily applied with an airless sprayer (nozzles: 3/17, 3/19, 3/25) or a brush (> 50 mm ; 2" width).
Cracks that are wider than 3 mm (120 mils) must be stuck over, covered with fleece or filled. The best coverage is achieved when a 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. The film is to be protected against moisture (e.g. rain) during drying.


Check whether the subsurface is suitable for a sprayable film before applying it. 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 stuck over before application (e.g. with one of the CONTEGA SOLIDO adhesive tapes, depending on requirements) or levelled off with filler.

Subsurfaces should be brushed off, wiped clean with a cloth or cleaned using compressed air. Application to frozen surfaces 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.

Alternatives Produkt



Fibre-reinforced brush-on sealant with a humidity-variable sd value (g value, permeance)




Fleece within the AEROSANA VISCONN system for covering cracks or joints