Concrobium 25326 Mold Control Spray, 32 oz

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.

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.

Just applied the product and it was super easy to use — no strong odor and sprays evenly. I’m giving 4 stars for now since I’m still waiting to see how well it works on the mold. I’ll update this review once I can evaluate the long-term results. So far, so good!

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.

Coming from the nutritional supplement world, I've learned to trust the ingredient label (in this case MSDS sheet) more than the marketing. When I received this product I found odd that it stated "Sodium Carbonate: 0.95%, Other ingredients 99.05%" on the front of the bottle. With the 99.05% accounting almost in its totality for the water, that leaves very little active ingredient. And to make matters worse, Sodium Carbonate is just 'Washing Soda', a cheap household chemical. I didn't really get where the special "mold crushing" ingredient was.After I checked the MSDS (Material Safety Data Sheet) for more info, it only listed "Sodium Carbonate: <1%, Trisodium Phosphate (TSP): 1-5% (by weight)". Both are cheap household chemicals a large section of people already have. Washing soda is used for laundry, and TSP is a general purpose household detergent and degreaser. If that's all this product is composed of, it isn't special at all. With a box of each (under 20$), you could make hundreds of gallons of the same liquid. I even poured Concrobium Mold Control liquid out of the bottle and it's pretty much crystal clear and odorless, so it certainly isn't evident that it's saturated with some special mold-annihilating substance.In the end I decided to just make my own using a 16oz empty spray bottle, around 500 grams of distilled water, some 5 grams of baking soda, and some 20 grams of TSP. The resulting liquid looks pretty much identical. Out of curiosity (and because I had the tool at hand), I checked the specific gravity of each liquid with a refractometer. Both the 'Concrobium Mold Control' and the DIY mix had very similar specific gravity, and barely above that of distilled water. In other words you're pretty much buying water with this product.Personally, I think I won't ever buy this product again and I'll just use more heavy duty chemicals if the issue is needed or just mix my own for light cleaning.

May be too soon to really tell (a year or two would help), but I have a sheet rock ceiling in one part of my house that has has visible mold for several years. Roof is decade old metal over asphalt shingles and recently replaced all screws. Mold was painted over, but come back through. Testing by a professional verified the obvious mold was mold, but mainly (I guess) told me it was not spreading. the report recommended Concrobium. I sprayed all the visible spots, and sprayed again the next day, and could see the black mold looking gray. Painted with an oil-based paint, then with ceiling paint. I am pleased with the results abou a month later.Professional recommendation was to remove all sheetrock, evaluate situation,. and replace and refinish the ceiling. I chose to skip to just the Concrobium and refinish the ceiling. Time will tell!

I received the product today. I will apply but the label is unreadable. The text print appears very blurry and gives you the impression you have blurry vision, which is not the case. The text on the label surely did not go through quality controls/quality assurance. This makes me question the validity of the product.Applied and no results. This is not the real McCoy. Amazon needs to check the validity of their sellers more carefully.