Air Tight Paint improves air tightness

In recent years we all noticed how important it is, to create a full air tightness strategy, which includes every part of the building.

The more air tight we want to have our building, the more attention we need to put into small details, to prevent the enhanced risk of uncontrolled air infiltration through these areas. 

Spots like chasings for conduits on perimeter walls or junctions between floor and walls are becoming more and more important when it comes to a functional air tightness with values of 1.5 ACH (air changes per hour @ 50Pa differential pressure) or less.

But how can you make certain areas of your house steadily air tight?


By using air tight membranes, tapes or plaster coating?


All three solutions above do create an air tight layer, but in the most cases there is an easier alternative available:

Belgacoat Brush & Spray air tight paint

Some Advantages of BELGACOAT Air Tight Paint:

  • easy and fast to apply
  • no additional trade required (e.g. plasterer)
  • perfect bonding to almost every substrate without additional pre-treatment
  • no risk of damaging the air tight layer by following trades
  • very low emmissions
  • one solution for new builds and renovations
  • creates a barrier against Radon as well (test report available on request)
  • brushable and sprayable version available

We´re using and supplying air tight paint since 2016.


It was originally developed for sealing the joints around windows, which does not work for the most buildings here in Ireland because of the cavity wall structure.

But there are plenty of other options, where Belgacoat Air Tight Paint beats any other air tightness strategy:

Typicall applications for Air Tight Paint