DuPontMold & Mildew Stain Remover for Natural Stone

Holy. Crap. Are you kidding me?!? This stuff is amazing. I’m so mad at myself for not finding it sooner and partially destroying me marble floor!It got the orange stains AND the pink mold out! I did t even have to scrub. I let it on for 20 and rinsed. That’s it. Brand new!Now if only I can find something that reseals effectively.

We have Laticrete Permacolor grout in Marble Beige in our shower, and this is the ONLY product that has truly removed mold/mildew and hard water stains. We cleaned a week ago and the stains (which typically came back after a day or two due to issues with the tile install) have not reappeared. We sprayed the cleaner on, left it for 10 minutes, and then scrubbed with a silicone brush. The stains were gone like magic. We had lost all hope in our shower looking nice before we used this.We were worried about ruining our grout in our cleaning attempts, but this product was recommended to us by Laticrete. Check your product specs or contact the manufacturer if you’re unsure if this is safe for your grout. Make sure you have proper ventilation and gloves on when applying, because the odor is very strong. There was no leakage from the bottle on delivery.

This stuff is magic! I was worried it wouldn’t work well since it’s marble safe, but it’s actually the best cleaner I’ve ever used!

I don’t know why it’s so expensive for a tile cleaner but it works great!

We live in Southwest Florida where the combination of high heat and humidity makes it ideal for growing mold and mildew. Getting it off natural (unsealed) stone is not as easy as you might think. Most of the products I researched will damage natural stone because of the Ph. People tend to forget that natural stone is porous and will absorb liquids -- and therefore show stains. Trying to use regular grout cleaner on marble will result in the marble edges touching the grout looking like someone buffed the sheen off it. Not good!After looking, researching, and trying several grout cleaning products, I finally found this DuPont Stonetech Mold & Mildew Stain Remover. It is a bit pricey but after several failures I was willing to pay a little more to effectively solve my problem. Our shower stall is composed of travertine walls and floors. Since it is in the corner of our master bath and has almost a floor-to-ceiling glass door, there isn't enough air circulation in it to prevent the formation of mold and mildew.Mold and mildew removal is pretty easy. Simply spray the mixture on your grout lines, wait a few minutes, and then scrub with a non-abrasive sponge or an old toothbrush. It doesn't take a lot of effort although stubborn stains will require a second treatment. The other tool that I've found to be indispensable in cleaning the shower is to use a clothes steamer. Anything that resists two treatments with the DuPont Stonetech product will easily be eliminated by using your clothes steamer. Just hold the steam head very close to the grout and the mold/mildew will disappear. And if there is still evidence of mold/mildew, try using a fine tipped scratch pen/sanding pen. Amazon sells the KTI-70550 for about $7.00. This essentially allows you to sand the offending mold/mildew off the grout while staying on the grout line and avoiding the marble edges.While using this cleaner, make sure that you have proper ventilation and use a mask to avoid breathing in the fumes. That strong smell that reminds you of bleach is sodium hypochlorite -- which is actually BLEACH. So take care to protect yourself and not damage your lungs. After using your clothes steamer for awhile you may decide that you get acceptable results (depending on how bad the mold/mildew is) just by using the steamer and avoiding the fumes.

This garbage should be banned. It is VERY STRONG bleach plus a few chemicals meant to end human lives. I can't believe Amazon and the government allowed this stuff to be sold. I used it once on my marble floor, which would likely be ruined now, and immediately used my remaining consciousness to dump it into the toilet and flush it down ... I thought I saw god. I mean, read the label - "DO NOT CONTACT. IT CAUSES PERMANENT EYE INJURY" ???? For real? Straight bleach works like skin care lotion comparing to this.

This is the BEST mold and mildew remover I have ever used. I will never buy another mold remover again. It did wonders for the grout in my shower tile as well as the walls. Just WONDERFUL!

This is my 4 bottle I have ordered, while the previous 2 bottles worked fine, the 3 bottle came broken I contacted amazon CS and immediately sent a replacement and reimburse my money, the last bottle I just ordered almost burn my lungs. the pump started to leak while pumping leaving a hedious strong smell all over and the smell spread to almost all of my house! This probably would be my last bottle I will order from this product. Can’t chance it with detective quality of the product causing more harm than good.. starting to look for a better alternative that does the work like this one without killing me! While previous bottles had the smell of chlorine it wasn’t as bad as the last one. update: this product definitely change formula didn’t use to be this strong. I only use it 1 every month and everytime with precautions and everything I end with a headache and smelling the chlorine on my nose and I can even taste it. Although it does the job the strong fumes overtake the performance, I’m considering using plain chlorine at this point as I find it even more stronger than the bleach itself. Other thing I notice is the pump from the bottle when is brand new is not a problem but when you get to half way or a 1/4 of the product the pump gets harder to use and it leaks while you spray so it gets everywhere on your hands and at a short distance from you as it leaks though your gloves (if you are wearing some). So if you are highly sensitive to chemicals or already have a health condition I advise you to stay away from this.