OXALIC Acid 99.6% 2 Lb. Deck, Crystals, Metal Cleaning- Rust Removal, Wood Stain Remover and More!

I have a high iron content in my well water. After getting a filtration system that solved the problem, I had to deal with the iron stains on shower tile, toilet bowls, and sinks. I mixed up some oxalic acid at a 1:16 ratio (actually used 1 Tbsp per cup of water), put it in a pump sprayer, and sprayed the shower tile. I walked away for a while and when I came back the tile looked like new! Not a hint of discoloration.So I sprinkled a small amount (probably about a Tbsp) in the toilet bowl and let it sit. Abracadabra, the stain disappeared. I wish I’d known about this is my previous house when I had badly rust stained toilet bowls. This stuff really works! Just be careful when mixing it that you don’t inhale the powder, it will make you cough and sneeze. This stuff is worth every penny.

Great product, multiple purchases. This is the only oxalic acid i have used, removes rust stains just fine, and balances wood pH.

I have Georgia red clay on about everything in the yard and oxalic acid helped remove it from concrete, stucco and wood steps. I used a 1:16 (1c/1g) ratio and rolled the solution on the affected areas. After letting it sit for 5-10 minutes, I brushed it then rinsed it off. It worked great for painted stucco and treated wood steps. The concrete will lighten somewhat and that may be due to either the strength or that I don't need to leave it on as long. It truly is a bleach to wood and concrete. On hot days, you need to keep the affected area wet until you brush/rinse.For mud on jeans or cotton pants, I rinsed off the dirt and mud. Then I mixed 1 tsp to OA to 2 gallons of water and soaked the clothes for about 20 minutes in a bucket, then brushed the stains away. For very heavy stains I resoaked and brushed again in the same water. Afterwards I loaded them into the washing machine with other clothes. This diluted mixture did not change the colors on any the clothes.

WORKS GREAT - RINSE EXTREMELY WELL 3 TIMES - YOU DO NOT WANT THIS ACID TEARING UP VEHICLE TIRES OR SHOE BOTTOMS

I really like this product, which I never even heard of and accidently discovered here on Amazon. I've used the deck cleaners from the big box stores but none of them came close to what this product did. Night and day difference, trust me. Mind you, unlike the cleaners you can get from the local store, this is an acid based big boy cleaner you need to be careful using. Overall, a great product that has multiple uses.

This is the same oxalic acid that is used for treating bees for varroa mites but is simply not marketed to that community. It's more economical than buying the "made for treating bees" brands and does the exact same thing. I had a bad infestation that got out of control (31 count of mites from test) and after a few weeks of treatments, I got it down below the normal threshold of three.

I bought oxalic acid to clean rust off an old cast iron pan I was reconditioning. Then we discovered several very nice folding tables stacked behind a shed, left by renters. They were covered with rust and dirt. I made a hot mix of the acid and scrubbed it into the tops. I was going to wait overnight but completely forgot about it until two days had passed. At that point, all I had to do was scrub a bit with an all purpose cleaner and the tables were pristine! Yay!

I use this with goggles and nitrile gloves to remove rust from my sister's yard sale treasures. It is a strong acid and poison; so, don't let it get on your socks. If you do, you will soon know it; so, quickly neutralize the acid with baking soda.