How does one prepare and apply this product? Is the water/product mixture paste-like or watery?

Dissolve it in hot water. Will be watery. Scrub hot solution in with a brush. Then make sure you clean it up with water after don’t leave any residue.

Can you use this on a metal rusted roof?

I have used it on metal corrosion on our fleet of sailboats for years and have been very pleased with the results. I have tried other products and found that almost nothing else works. If you plan to repaint after removing the rust/corrosion you will need to make sure your wash the surface several times with fresh water. For stubborn areas, you may need to do a little wet sanding with very fine sandpaper (300 GRIT or higher). If you have any wood in the area that you don't want bleached (e.g. a wood deck or stairs) you should cover it and then hose it down as soon as possible if any of the oxalic drips on it.

Is this a good product to use for removing rust stains on pavers and travertine? What is the mix ratio?

I have successfully used about a tablespoon per quart of water for removing paver/concrete rust stains.

Can a mix be used to remove rust from inside a fuel tank? I would think it would be more gentle and less likely to produce pin holes .

Yes. It works well. I have used it in a Ural gas tank, which was stored for 13 long years with bad gas. This stuff in hot water removes all rust pitting from inside the tank. I had to use baking soda mixture to neutralize the process. I then used a pint can of the Red Kote to line the tank. Great results.

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

Product ID: 354315879

Details

Brand
Florida
Item volume
907.18
Item weight
0.9 Kilograms
Molecular weight
36.46
Percentage assay
99.6

🔥powerful rust & stain remover

🧪99.6% pure oxalic acid

🛠️2 lb industrial-grade powder

R1993

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Description

🧼 Transform your surfaces with pro-grade power – don’t let stains hold you back!

SAFETY FIRST - Clear usage guidelines and safety recommendations for confident handling
ULTRA PURE FORMULA - 99.6% purity ensures maximum cleaning power and consistent results
TRUSTED QUALITY ASSURANCE - Backed by 14+ years of continuous lab testing and product refinement
PROFESSIONAL GRADE QUANTITY - Generous 2-pound bag designed for multiple heavy-duty applications
VERSATILE CLEANING SOLUTION - Effectively removes rust, wood stains, and metal discoloration with ease

Florida Laboratories OXALIC Acid 99.6% is a premium-grade, 2-pound powder designed for powerful rust removal, wood stain elimination, and metal cleaning. With over 14 years of research-backed quality assurance, this ultra-pure formula delivers professional results for demanding household and industrial applications.

Specifications

% Assay of Chemical(s)	99.6
ASIN	B0147GM7CQ
Best Sellers Rank	#118,379 in Health ( See Top 100 in Health ) #1,760 in All-Purpose Household Cleaners
Brand Name	Florida Laboratories
Container Type	Bag
Customer Reviews	4.7 4.7 out of 5 stars (2,171)
Item Form	Powder
Item Weight	0.9 Kilograms
Manufacturer	Florida Laboratories
Molecular Weight	36.46
Part Number	oxl5
UPC	741296770580
Unit Count	946.35 Milliliters
Volume	907.18 Milliliters

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R1993

Duties & taxes included

In stock

Sold byAmazon South AfricaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to South Africa.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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