Today, we’re talking about that white substance you can see on stucco or cinderblock walls. Hi, Mike Ricker. I’m the owner of Crash of Rhinos Painting. And today, we’re talking about that subtance that you can see—it’s typically white—on cinderblock walls, or on stucco. Today, it’s going to be specifically on cinderblock wall. So, you can see some of this here, and here. Most often, you see it when it’s down low. That’s not the case this time with this fence. Two main things that can happen with this. It’s either an issue called calcification, or another issue called efflorescence. Efflorescence is the pH that typically happens on stucco, which is where you see that mostly. As the pH neutralizes, it creates salts. Those salts leach through the paint and cause an issue of efflorescence. You can handle that mostly by putting a good efflorescence-stopping primer on raw substrate beforehand. On this issue, it’s most likely caused by the porous nature of cinderblock. And that hard water leaches through there, leaving those hard water deposits back. Different ways you can handle this. It can be through a sealing primer and painting. That’s literally the best way to handle this most often. And so that’s what we’ll be doing today. And that is how to deal with the white substance of calcification on fences.