I tried this anti-condensation paint to tackle the black mould problem in my bathroom and this was the result

"Anti-condensation paint is designed to prevent condensation forming on the surface of the walls," explains Damian. "Tiny glass spheres are contained within the paint which help to create a lower thermal conductivity on the surface of the wall..."

"The change in that surface temperature helps prevent condensation from forming," Damian continues. "It's particularly effective in areas like bathrooms where dampness and cold walls are a persistent problem."

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