Selleys Rapid Mould Killer

It has been raining nonstop and I'm not sure if its because the paint we use suck, or if its just the weather and tons of mould spores in the air, but we have been having mould issues in our house. This managed to cut through the mould and its been about 1 month and (touchwood, the mould hasn't come back). I have also included a photo where i sprayed parts of a wall with the mould killer and left the rest alone. See the difference youself!