Where to use it

Diasen BKK Eco can be used on exposed stone, masonry walls and plasters from water absorption due to wind driven rain. The water repellant coating has no visible effect on the wall so is an ideal protective coat for solid stone, brick and other masonry walls that are insulated internally with Diathonite Thermactive.037 plaster, Redstone Clima Redboard Pro or Gutex Thermoroom.

It may also be used internally to protect Diathonite plastered walls when the bare plaster is not finished with Argacem HP, Decork or Cork Render (for example when the plastered wall will have timber panelling installed over the top). It may also be applied over Diasen Argatherm where the homeowner does not wish to paint the finish plaster. Please note, natural variations in the consistency of the finish plaster will then be exposed. To attain the most consistent finish it is recommended to paint with a breathable finish such as Auro natural paint.  You may be interested to read an article in Listed Heritage Magazine.

For optimal performance and longevity of any internal wall insulation system, it is crucial to evaluate the suitability of the wall and rectify any problems before installation begins. Please read our guide: “How to prepare traditional solid walls for IWI Installation” to ensure you achieve the best results.

What it does

This water repellent coating lets moisture dry out to ensure the wall and its insulation performs at its highest level. When a wall is insulated internally with Diathonite Thermactive.037, Redstone Clima Redboard Pro or Gutex Thermoroom; Diasen BKK ECO is the perfect choice for protecting the external side of the walls.  

How it Works

BKK water repellent for brick and stone prevents water ingress from the external wall’s surface while preserving breathability.

Why we love it

As water does not stay on the BKK Eco treated wall (it runs straight off), it cannot evaporate on the surface to leave any dissolved solid behind (e.g. salt from sea water) or remain long enough to feed algae. It therefore prevents algae growth, stains, and deposits on the wall. It also prevents frost damage to the wall as water can’t freeze and damage the surface if repelled rather than absorbed.