House about 700 metres from Safety Bay ocean.
Used ’30 seconds Outdoor cleaner concentrate’ then Crommelin ‘Limestone & Sandstone sealer’. Within 2 years mould stains return.
Can it be better?
Thank you.
285100cookie-checkDark gray mould on exterior rammed earth (limestone) wall
Nope – given the intrinsic problems with limestone, I’d say a 2y turnaround is pretty good. Crommelins are good products
https://www.drchemical.com.au/questions/mould-on-liquid-concrete
https://www.drchemical.com.au/chemistry-at-home/garden/limestone-walls-and-the-problems-they-cause