DomesticDynamics 0 Report post Posted August 19, 2015 First post here. I have to clean a very dirty sidewalk in front of a house. It has moss growing on it. In the past, I have just power washed stuff like this with 3500 PSI. Probably use the turbo nozzle. It basically works, but it makes a big mess and it's tough to prevent streaking. I have some F18 for stripping decks, but it says that can be used for cleaning conrete as well. I'm thinking about trying that. Maybe add some SH? Maybe I'll give it a quick wash to get the moss off and then go over it again with chemicals to even it out. It's not the big of an area, but it goes right up to their front door, so it's pretty high visibility. Any suggestions for me? Share this post Link to post Share on other sites
Beth n Rod 1,279 Report post Posted August 26, 2015 A sodium hydroxide cleaner and bleach makes the work turn out the best in my experience. Also, you may want to look into a surface cleaner to help it look even. Rod Share this post Link to post Share on other sites
