DU-MOSTLimescale & Rust Cleaner Concentrate, Heavy Duty Delimer, Descaler, Remover of Hard Water, 32oz

This DU-MOST is great stuff! The lazy way the toilet was flushing we wondered if our septic might need pumped or something. But no. It was a buildup of limescale in the water ports around the rim of the toilet bowl. Happy Day! Just be sure to wear good eye protection and rubber gloves as, by nature, anything that removes limescale and rust this well is caustic. I'm a fan now and will buy more when needed. Thank you DU-MOST!

I learned the first time that I used this in our small, enclosed bathroom that I will never use it again without a mask on. I used a sprayer that produces a pretty fine mist to dilute it into (1:8), so that may have been part of why--I suggest you use a spray bottle that produces a normal to thick mist with it.Our main problem is calcium buildup from our hard water. As long as I allowed it to sit and soak in for a while on our fixtures, it does help the buildup come off nicely.With such a high dilution, this bottle of cleaner will last a very long time and is quite economical.

I had a small brown ring at the water line in the toilet. Nothing got it clean n I was very skeptical of using pumice in my toilet due to scratches. So I ordered this product n dribbled it on the stain n left it overnight. Didn't even scrub just let it soak in both toilets. OMG. ..the stain is gone!!! Just in time for Holiday Company. Like brand new!!!

Horrible rust stains and it worked.

The instructions are pretty poor. They say that you can use it with faucets, but don't say how, which percentage of a solution you should make. My sink drain had some deposits, so I poured some water and poured some solution and waited to see if it would be better. It got better after about an hour, so I dumped the water with the product and rinsed. I suppose that's what I am supposed to do... I guess I should try again maybe with a more concentrated solution, but I also don't know if this will hurt my septic tank, my drains, etc. It did start bubbling when I first poured it.

It's perfect for removing stubborn stains.

Amazing lime and rust remover. Hard water stains be gone. This concentrated liquid requires diluting with 4 to 1 ratio with water before use. I put in a spray bottle and started spraying rust pipes and faucets with hard water. Works amazing removing both limescale and rust!

This is a very strong powerful cleaner. You need to use gloves and probably a mask when using it. And even then still be careful. It needs to be diluted so you don't need to use much and it will last a long time. I used it to clean an old stained sink in the basement and it worked very well. Just be careful when using and make sure to take safety precautions.