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Had years worth of dark mold/mildew stains on bathroom ceiling. Put off cleaning because of hours of scrubbing required by tsp and other similar solutions. This product says spray and it works in 15 seconds. To be honest, I was skeptical. When it arrived, I sprayed a spot to test and watched the second hand on my watch - 15 seconds and the test spot was clean. My wife has done the entire bathroom and looks like new. Started with 2 32 oz bottles which wasn't quite enough so I bought a gallon. HIGHLY recommend having a window open - VERY strong bleach like scent. The smell will also take a while to dissipate but definitely worth it. As an added bonus, the product is made in USA by a veteran owned business.

First off , I am stating my personal experience with the RMR product in review. As with many of the other reviews, I must caution that the RMR mold and mildew remover is hazardous to your health if you don’t follow all of the directions. Plus, you absolutely must use the proper PEE equipment to insure your own safety and health. For me the basic requirement for use would be a full-faced respirator and chemical resistant gloves. Also, proper clothing to cover any exposed skin. I my opinion, the RMR mold remover is made for professional use or for others who have the equipment and experience to safely use it. I consider my a life long DIY person and have used many cleaning products in past years. I read the product reviews and was made well aware of the negative effects of using the said product. My neighbor is old and handicapped. He asked if I could check his bathroom commode for a leak as his bathroom floor was flooded. When I checked the bathroom there was a obvious leak under the sink and apparently it had been leaking for a while. On top of that the was serious mold on the shower and the walls and ceiling. I repaired the leak and did a search for mold removal product. I read about the RMR and ordered the gallon size. When I first started using the RMR I was not using any PPE equipment. I thought that I could spray a small area and leave for fifteen minutes or so and that would suffice. That turned out to be a big mistake. After serval sprayings the fumes were overwhelming. My throat and eyes were burning and I had started coughing almost violently. I left the area and after several hours a returned with a half-face respirator I had and some eye googles. Also I had the window open and a box fan running to pull the fumes out. The respirator was working, but the safety googles did nothing to stop my eyes from burning.There for I am recommending a full faced respirator. I manage to finish the mold removal, but paid a heavy price on my eyes and lungs. Now that you have heard my experience with RMR mold remover, I will tell about the product. To make things very clear, my lack of caution and preparation is on me. The RMR mold remover works as other have stated. The product works almost instantly and in most cases there is nothing left to cleans, but nonetheless, I did wipe the areas down with a clean towel. I can’t fault the RMR product in regards to its effectiveness. I have never used a more effective product in the past. I can rate the RMR mold remover five stars, but with a caveat and warning concerning the hazards to one’s health if the proper equipment is not used.

Ok, seriously, if you’re brave AND a home owner, BUY THIS. This is the literally the BEST product for mold or mildew i have ever used. YES, it may need to be evaluated by the Chernobyl Nuclear Assessment Team down the road, but PLEASE let me explain and leave some application pointers #1) If you're not using PPE + a respirator, make SURE you only plan to work on small patches at a time, and in a well ventilated area you can get in and out of to fresh air quickly. I cannot stress this enough. This stuff is STRONG. As in...BLEACH x about 5. You can Taste It. Do NOT BREATH IT! If you can, hold your breath, hold the bottle at a safe distance, spray the area quickly, then runaway! “Spray. Then Runaway.” #spraythenrunaway #2) Get a CLEAN towel and place it under the door crack of the room you run out of after spraying. use it, ALWAYS! Clean towel is your buddy here. #3) After 15 minutes, Hold your breath and check out your progress carefully. It dries VERY quickly and the smell/fumes drop to a good 1/2 of what they are during initial application. Again, wait AT LEAST 15 minutes before checking. More mold? Spray a bit more in the areas that need it, ...runaway #spraythenrunaway, ....wait 15 more mins and check again....same process as above. #4 Repeat protocol until about 15-25% of mold or mildew remains. #5 WAIT 2-5 HOURS then check again. At this point, the mold should be almost 100% gone. #6 IF more application needed, repeat process again as many times as needed, ....then proceed to fortune and glory. My Actual Spray Process I used on our Bathroom Window Casing: 1. Remove Blinds. 2. Cut large piece of cardboard out to use as a mask for window vinyl, steel or fibrex behind the wood casing. 3. Grab paper towels, about 10 squares and fold them into little wads that can be stuffed at the bottom of the window sill's left and right sides to catch the runoff from the vertical side casings. 4. Grab a small ziplock bag to store the used paper towels in and keep them sealed up and the fumes contained. You can just leave that in the sink. 5. Get a fan and set to low about 3 feet from the open window and blowing toward it. 6. Grab your cardboard and your RMR 86, take a deep breath, hold it....hit the left side wood casing, using the cardboard as a mask for the window behind the casing, hit the right side, same process. Do NOT try and do the top casing, or spray will potentially come back down on you and get on your skin. Don't overspray. Just hit them quickly enough to cover each side. About 15-20 seconds total should be fine. Stuff paper towel squares in the lower right and left window frame, runaway! (for me, I closed the door behind me and stuffed a paper towel under it. Worked like a charm as the smell never got into the rest of the house. 15 minutes later, I cautiously walked back in each time, smelling carefully from a distance and as I approached, as I said, the fumes and volatility drops a LOT after the first 15 minutes but is still STRONG! I removed the paper towels used to capture the runoff in the lower left and right sills, sealed them in the baggie, dropped it back in the sink. Then went outside the room to fresh air, took another deep breath and repeated step 6. Our casing was BAD, so I had to hit it about 4x over an hour. For me, and because I was doing such a small area with plenty of ventilation, I did not go full PPE or respirator. I used long dish gloves, goggles and held my breath each application, keeping the airflow via a fan pushing air OUT the wide open window and as to move any overspray or fumes outside asap. The first application, not a lot of difference. Second, BIG difference. By application 4, 85% of the mold and mildew were gone and we were looking at CLEAN wood. Next morning, I checked and the mold was 100% GONE...so this stuff KEEPS working long after that 15 minute mark. I'd say it likely keeps working up to 24 hours after application so expect to see additional progress on the affected area up to a day later. For the TOP casing, I waited until the sides were treated as explained above. Then 2 days later, I used the same ventilation setup as before. This time, I grabbed a paint brush, poured a tiny bit of rmr 86 into a plastic cup, and lightly painted it onto the top casing, still wearing gloves and goggles. It took more applications...i believe 5 or 6, but was a lot less stressful as I was using so little of the stuff and the fumes, although still bad, were no where near what spraying did. Each application, I'd let sit 15-20 mins, and I kept the paint brush and tiny bit of RMR solution in a cup in the sink so I could just grab and go each new session or dump out with running water. This worked well on the top casing as it was no where NEAR as caked as the left and right sides were, but something tells me, spraying/aerating this stuff out of the bottle must increase effectiveness, as it IS a corrosive and reacts with O2. I'd say if you're doing ANY job larger than what I described here, go Full PPE with Respirator and make SURE the room you are working out of is well ventilated and siphoned OFF from the rest of the house. If you're just squirting a few corners of your bathroom...1-2 squirts, 1 area at a time, then gloves, eye protection and lotsa of ventilation should be fine. Higher up areas, I'd recommend the paintbrush trick. And I'd personally NEVER try and spray multiple areas in the same room...I'd do 1 at a time and leave. Even a few squirts in a few areas adds up fast, and you don't want to create a potential "fume trap" by which you get a breath of lingering spray and burn your lungs/throat, etc. Not worth it!

This is one of the most amazing cleaning products I have ever used. It helped me clean my moldy bathroom and restored it to pristine white within minutes. However, to safely use this product, you really have to treat the product and cleaning procedure like a science lab. The people who are having problems with this product aren't. Here's a mini science lesson for you all. Mold have spores that protect the cells and keep them alive under *extreme* conditions. This product is DEFINITELY strong enough to destroy the spores and therefore successfully keeps the molds away. I've sprayed my bathroom months ago and take extremely steamy showers. Still no black or pink mold anywhere. Now here's the catch, in order to destroy spores, the chemical has to be pretty strong... This stuff is advertised as 5x stronger than other chemical cleaning products. The directions on the bottle even asks you to check the MSDS. Think back to chemistry lab where you have to take safety measures, follow instructions carefully, wear goggles, gloves, and cover exposed skin. Remember, this is a VERY POTENT BLEACH. You don't need to be a rocket scientist to use the product. Just know this: 1) If you are working in a small room, ventilate the area before spraying and for long after. 2) Put on a MASK and maybe even goggles. COVER ANYTHING YOU DON'T WANT TO BLEACH. Wear an apron if you're wearing something nice while cleaning. The stream/spray nozzle will splash the product and bleach whatever it touches. You really don't want this to get on anything other than the thing you want to clean. The blue pants I wore have white spots with pink halos now. 2) DO NOT INHALE and THOROUGHLY WASH your hands and anything the product might have touched with water. THOROUGHLY. 3) **MOST IMPORTANT** DO NOT THROW AWAY THAT SCREW CAP THAT CAME WITH THE BOTTLE. Unscrew the spray nozzle and screw the original cap back on to store. ** This last step is where I made my mistake. As a person who's worked in chemistry labs for years, I should have known better. I treated the bottle as any other cleaner and thought I wouldn't have a problem storing it with the spray nozzle still attached. WRONG. The directions aren't explicit enough when it says "Cap bottle after usage." I thought this meant screw the nozzle tighter. You have to close it shut - air tight - with the original cap!! Otherwise, if you store it with the spray nozzle still attached, exactly like how I did and many others who gave bad reviews, the solution leaked out of the spray nozzle and ruined all of my cosmetics and toiletries in the bathroom cabinet. It turned my paper boxes into goop, melted off the waxed paper coverings and revealed the aluminum sheets that lines wet towelettes, and glued the bottoms of the boxes into my white cabinets. I didn't realize what had happened until I saw that a brand new product box had been bleached at the bottom. I picked it up and the whole bottom came off. PEOPLE, this is a highly volatile, highly potent bleach! Treat it as such and it will be a dream to clean whatever mold and mildew you wanted to get rid of. Treat it as anything else, and it can quickly turn into a nightmare. Seller, PLEASE make the safety precautions and directions more clear.

This is my second purchase of this product. I bought the RMR-86 Instant Mold and Mildew Stain Remover for stubborn stains in my bathroom, and it worked great. I used it on mold stains in grout and the results were almost better than I expected. The stains started were taken care of with very little scrubbing, just a light pass with a toothbrush. It worked very easily and saved me a ton of time compared to other cleaners I’ve tried that require repeated applications or hard scrubbing. One small improvement would be the strong smell during use, good ventilation is definitely a must. That said, the effectiveness more than makes up for it. After using it, the surfaces looked noticeably cleaner and brighter, and the stains haven’t come back so far. Overall, this is a powerful, no-nonsense cleaner that does exactly what it promises and is well worth having on hand for tough mold and mildew problems.

Super easy to use. Sprayed on a wooden patio table, and a mesh patio chair. The mold & mildew stains nearly instantly disappeared, and they look new again. Strong bleach odor, but not overwhelming.

I don’t usually write reviews, but I had to on this one. I have literally tried at least a dozen things to get rid of mold on the grout in my shower. It has been so frustrating. I ordered this last night and it was delivered very quickly. I tried it a few minutes ago, and I could literally see the mold fading as I watched. It took seconds. And within five minutes, there was no trace of it left. Caution: It does have a very strong bleach smell. So I definitely recommend ventilating.

I ordered RMR Brands Complete Mold Killer and Stain Remover Bundle—2-32 ounce sprays because I had a nasty stain on my kitchen wall (see photo). A bag of sugar snap peas had rotted at the top of the trashcan and was evidently touching the wall (don’t judge!). I thought the stain was mold, but as I used these products, I saw that it wasn’t, but rather the dried residue from the rotting peas. Here is what I did: RMR-141 Disinfectant, Fungicide, and Cleaner 1. Because I had read in the reviews about the odor of the products, I first opened the patio door and the bedroom window (we have a small apartment). I turned on the exhaust fans in the bathroom and the laundry room, and the ceiling fan in the dining room. I also placed a stand fan in the living room and one in the bedroom, and waited for about 30 minutes for the air to flow well before I started using the products. Turns out RMR-141 has no odor. 2. I read the instructions on the purple bottle, that of the RMR-141 Disinfectant, Fungicide, and Cleaner. NOTE: USE THIS PRODUCT FIRST. 3. I opened the seal and inserted the provided pump. NOTE: THE PUMP COMES IN THE “SPRAY” POSITION. BE CERTAIN TO SCREW TIGHTLY; EVEN THOUGH I DID, THE PRODUCT POURED OUT OVER MY HAND LATER WHEN I TILTED THE BOTTLE. 4. I sprayed the area on the wall thoroughly, starting at the top. The stain began running down the wall immediately. 5. I then waited for 10 minutes as per the instructions. 6. Wearing glasses, a mask, and gloves, I used a wad of paper towels and made one swipe through the middle of the area so I could see how well the product worked (see photo). I was impressed. 7. Then I scrubbed the wall. 8. I applied the RMR-141 a 2nd time and immediately scrubbed the wall again with no waiting period. Much more came off the wall. 9. I applied the RMR-141 a 3rd time and waited another ten minutes. 10. I scrubbed the wall with paper towels again. 11. I sprayed the wall with RMR-141 a 4th time and scrubbed (see photo). 12. I sprayed a 5th time and scrubbed with a thick crevice brush (see photo). I actually took the paint off down near the baseboard. 13. Then I was satisfied I had gotten the wall as clean as I could and I let it dry for an hour. RMR-86 Instant Mold and Mildew Stain Remover 1. See #1 above. RMR-86 DOES have a strong odor reminiscent of bleach. 2. I read the instructions on the green bottle, that of the RMR-86 Instant Mold and Mildew Stain Remover. NOTE: USE THIS PRODUCT LAST. 3. I shook the bottle well, as the directions stated. 4. See #3 above. 5. Wearing glasses, a mask, and gloves, I sprayed the area on the wall thoroughly, starting at the top. 6. I watched for 15 seconds, as per the instructions. There was no change. Keep in mind the stain on my wall was NOT mold or mildew, which is what this product is for. 7. I rinsed the wall and floor thoroughly with clear water. 8. To avoid the possibility of any sort of chemical reaction or contamination of other items, I put the paper towels and gloves used with each product in separate gallon Ziploc bags before putting them in the trash. Dispose of chemically saturated towels, rags, and gloves responsibly! 9. I left my apartment open to the air for two hours. Overall, I’m very happy with my purchase. The kitchen wall will still have to be painted eventually, but the performance of RMR-141 was impressive. I can’t speak to the performance of RMR-86, but if the reviews of other buyers are anything to go by, it, too, is an incredible product. At the price point of $23.99, this duo is a good value for the money. Even with the glowing reviews I read before buying, the performance of RMR-141 exceeded my expectations.

This smells just as it should because it DOES THE JOB. Killed stubborn mould without touching or scrubbing. Very strong But it did smell which is understandable. Did it in the morning and left windows open all day. Expensive but it did the job so was definitely good value instead of wasting money again on a cheaper product that’s less effective

It promises to remove mildew stains from concrete and stucco. We followed the directions exactly and it made absolutely no difference. I wasted $90. I got better results with vinegar. Very dissatisfied.

Great product and to be honest it blew me away with how effective it was. Removed all the mold and did not leave any stains. I would advise to wear a mask as it is quite strong and does produce a lot fumes which can be quite irritating

I was a little sceptical about this product especially given the price and claims even more that given products I've used barely work with multiple applications and hard scrubbing. But WOW this product actually works and does so within seconds. No idea what is in this stuff and would advise strongly wearing gloves and if you are spraying a ceiling some eye guards but this literally makes mould varnish in front of your eyes. The time this saves is worth the added coat alone. I think I've discovered a miracle..

This product is really good. It removes limestone yellowing, mildew, and whitens the crevices and sealant brilliantly and fast. It takes all the effort out of keeping mold and staining out of the bathroom. Some minor setbacks include a leaking spray unit, which I've seen reported in some reviews and I'm experiencing myself. You certainly do not want it to stay on your hands for long, you must rinse immediately! It's definitely got strong bleach in it too, and is a strong alkaline. CAUTION IS ADVISED! Read the instructions! Wear nitrile gloves or kitchen gloves for use. That's how badass this is! I ended up buying some empty spray bottles and replacing the one it came in because it leaked all over my fingers during operation. This maybe a fairly isolated incident, but as I've written above, some reviews here say the same thing. Overall, if you are willing to adapt as I have, its the BEST ever product of its type I have found so far. Used with common sense and caution, it will serve you well!