Passive Purple Liquid Brush, this is a much thicker (paintbrush applied version of Passive Purple).

For small projects, such as private houses, Passive Purple Brush can be used with a flat paintbrush. In this case, an airless spray device is not needed. The wall/ceiling connections also need to be made airtight, certainly when the connections are made of two different types of construction materials such as red brick/concrete or steel/concrete. Different construction materials react differently to changes in humidity, temperature and move at different rates which can lead to small cracks in plaster or another type of finishing, and so creating air leaks that will cause the energy performance of your building to suffer and potentially opening the gateway for damp and mould to appear.
For these wall/ceiling connections, both products can be used: Passive Purple which is sprayed with an airless paint spray device. or Passive Purple brush which is applied by brush, If you don’t have an airless sprayer but would still wish to install Passive Purple your self don’t worry we have a roller version for you, it may take a bit longer but it still gets the job done.

Envelope Penetrations

Service penetrations can be the down fall of any airtightness testing. Passive Purple and Passive Purple Brush is applied around objects that penetrate any surface to the external envelope sealing where most tapes and membranes fail.
Before you apply Passive Purple/Passive Purple Brush, first apply polyurethane foam around any penetrations; after hardening, remove the excessive foam, and apply generous amount of Passive Purple Brush with a flat paintbrush; in all cases, apply a sufficient, well covering layer to guarantee airtightness.

Window/Door Reveals 

Passive Purple can be applied (and is tested) on different construction materials such as concrete, brick, wood, PVC, aluminium, polyurethane foam and with a coat of Passive Purple, the whole window/door reveal can be made airtight.
Working method: cut off the excess of polyurethane foam, and apply Passive Purple Brush.