Concrobium 25326 Mold Control Spray, 32 oz

Screen porch had black mold spots on lower wooden walls. Simply spraying did not remove the mold, but after scrubbing the spots and musty smell were gone. The wood has a rough surface, which made the job a bit more laborious, but definitely worth the effort.

This stuff is great! Works on almost any surface, won't stain or bleach. I regularly use it inside my through-the-wall AC unit and on the fins to prevent mold/mildew. Have used it on drywall in the basement as well. No obnoxious odor either.

There is lots of misinformation out there about mold. In a nutshell, this is the way I understand it:1) Mold is an organism that needs moisture and darkness to survive (like plants, only mold needs the opposite of sunlight)2) Mold spores are what most people are allergic to3) Mold spores are everywhere, but will only become live/grow with water and darkness4) So mold spores can sit and wait in a dry, light environment for years (like plant seeds)5) Wiping mold with bleach and a sponge will cause the live mold to die, but the tiny mold spores will fly around into the air and find another place to hideout6) "Encapsulating" mold spores is one of only a few ways to prevent mold spores from growingThis product will immobilize the mold spores. If you want to get rid of discoloration from live mold, your best bet is to clean with bleach first and THEN apply this product to lock down remaining spores in the area. This product works exactly as intended, but will leave some surfaces a bit tacky (it leaves a coating); it's the nature of how it controls future mold. IMHO, it is not great at cleaning the surface of live mold, but it will stop further progress.Bottom line: use this for locking down spores and inhibiting/preventing growth... use an additional product to clean live mold and related staining. Also, eliminate the source of moisture (very important) and add light to the area.

I am IICRC certified in water restoration and mold remediation. I do insurance estimating and project management for mitigation and repair work. Concrobium is one of the benchmark chemicals and brands used in this industry. I use this spray bottle one for the temporary office we have set up in the wake of Helene. Older building and the basement brick wall get mold growth due to the water table, ground water intrusion, and simply the age of the property.This product is great for spot treating light to medium discoloration. Bleach is of course very effective but can stain and leave behind a lingering smell. This product does not. I use it to treat and wipe down the walls once a month.This is not a permanent solution or will be effective against stopping recurring growth and or excessive growth. You will need commercial grade quantities and proper drying and abatement to remove mold/discoloration permanently along with reducing the amount of relative humidity in the air IE you may need to install a permanent dehumidifier and or air scrubber.I also use this to spray down my work clothes if i’ve been in a very dirty job site or a hot messy job site that’s full of mud, downed trees, etc. This will help prevent clothes from having that weird body odor smell even after cleaning in the washing machine. I also use it on my work shoes.There’s nothing fancy or special about this product. It’s just consistent and you know what you are getting. I am sure you pay more just based on the brand but the brand is iconic in my industry for a reason. It’s because it has decades of service in water and mold restoration projects. We would also use this with a viruscide product and deodorizer and cold fog commercial spaces during 2020.

Have used this product in the past and it works pretty well. The problem is packing. The bottles are spray bottles and are not sealed. They were laid over on their sides inviting leakage out into the cardboard shipping container.This is a very expensive product and getting a mushy box won't cut it.