--- product_id: 18741727 title: "OXALIC Acid 99.6% 5 Lb. Deck, Crystals, Metal Cleaning- Rust Removal, Wood Stain Remover and More!" brand: "florida laboratories" price: "€ 73.06" currency: EUR in_stock: true reviews_count: 10 category: "Florida Laboratories" url: https://www.desertcart.hr/products/18741727-oxalic-acid-99-6-5-lb-deck-crystals-metal-cleaning store_origin: HR region: Croatia --- # fast-acting rust & stain removal 99.6% pure oxalic acid 5 lb bulk industrial size OXALIC Acid 99.6% 5 Lb. Deck, Crystals, Metal Cleaning- Rust Removal, Wood Stain Remover and More! **Brand:** florida laboratories **Price:** € 73.06 **Availability:** ✅ In Stock ## Summary > ⚡ Transform your surfaces with pro-level power — don’t let rust win! ## Quick Answers - **What is this?** OXALIC Acid 99.6% 5 Lb. Deck, Crystals, Metal Cleaning- Rust Removal, Wood Stain Remover and More! by florida laboratories - **How much does it cost?** € 73.06 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/18741727-oxalic-acid-99-6-5-lb-deck-crystals-metal-cleaning) ## Best For - florida laboratories enthusiasts ## Why This Product - Trusted florida laboratories brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Bulk 5 lb Supply:** Cost-effective volume to tackle large projects without running out - • **Fast-Dissolving Crystals:** Quickly activates in warm water for immediate results - • **Ultra-Pure 99.6% Formula:** Maximum potency for professional-grade cleaning power - • **Trusted by Pros for 14+ Years:** Backed by continuous lab testing and proven reliability - • **Versatile Rust & Stain Remover:** Effortlessly dissolves rust, wood stains, and mineral deposits ## Overview Florida Laboratories’ Oxalic Acid 99.6% (5 lb) delivers industrial-strength rust and wood stain removal in a fast-dissolving crystal form. Trusted for over 14 years, this bulk supply offers professional-grade purity and versatility for cleaning metal, decks, and more, making it the go-to solution for managers and pros who demand efficiency and cost savings. ## Description For over 14 years, Florida Laboratories has been dedicated to continually improving existing formulas and developing new products to meet market needs. We are committed to ongoing research for new and improved products and have implemented continuous laboratory quality assurance testing of all products to confirm the high standard we expect from our raw materials and finished products. We are pleased to offer you the finest raw materials available for your needs on the planet.You are buying Five (5 Pound) of OXALIC ACID 99.6% Purity. Warning: Keep away from Children. If in contact with skin or eyes, wash with running water. If inhaled, move person to fresh air. If ingested, drink water to dilute material in stomach. Use Gloves and Protective Mask. Measurements and Instructions not Included. Review: Rustaid Shame On You, This Product WORKS THE SAME!!! - Why spend $14.99 on Rustaid from a big box store when Oxalic Acid is the same active "Main" ingredient. I can make 6 gallons with one 5lb bag and save a pile of money. If you have any PVC products, fencing or siding covered with rust water stains USE THIS!!! Make a 10% solution (13.3 ounces or 377 grams powder per gallon of warm water). Just like Rustaid within seconds the rust stains start to disappear. Dissolves quickly in warm water and I use a 2 or 3 gallon sprayer. I have been using this stuff for several years in my Real Estate Post Sign business (We Use PVC Posts). Every truck that goes out has a bottle of this stuff with them. Review: Use it cautiously - This is something that will clean toilet tanks and bowls but use it cautiously and with gloves. It is very corrosive to skin. I use it as if it's comet. Turn off the water, flush and then scrub the bowl and tank Turn water back on, Let the tank soak abt 20 mins and flush a few times. You can get water spots of glass with this too and clean showers (porcelein) and tubs. I wouldn't use it on fiberglass or other similar products. ## Features - OXALIC ACID 99.6% PURE (Dihydrate) - Deck, Crystals and Metal Cleaning - Rust Removal, Wood Stain Remover and More! - Usage instructions found underneath product picture. If you do not see the instructions you are looking for, simply send us a message and we will respond with the information requested. ## Technical Specifications | Specification | Value | |---------------|-------| | % Assay of Chemical(s) | 99.6 | | ASIN | B0147JPQAI | | Best Sellers Rank | #117,856 in Health & Household ( See Top 100 in Health & Household ) #27,731 in Household Supplies | | Brand | Florida Laboratories | | Brand Name | Florida Laboratories | | Customer Reviews | 4.7 out of 5 stars 1,247 Reviews | | Item Form | Liquid | | Item Volume | 5 Liters | | Item Weight | 2.27 Kilograms | | Manufacturer | Florida Laboratories | | Molecular Weight | 208.98 | | Molecular weight | 208.98 | | Part Number | ox5l | | Percentage assay | 99.6 | | UPC | 741296770603 | | Unit Count | 80.0 Ounce | | Volume | 5 Liters | ## Product Details - **Brand:** Florida Laboratories - **Item Weight:** 2.27 Kilograms - **Molecular weight:** 208.98 - **Item Volume:** 5 Liters - **Percentage assay:** 99.6 ## Images ![OXALIC Acid 99.6% 5 Lb. Deck, Crystals, Metal Cleaning- Rust Removal, Wood Stain Remover and More! - Image 1](https://m.media-amazon.com/images/I/71oAi3ZEwzL.jpg) ## Questions & Answers **Q: How much powder is used per gallon of water?** A: For comparison, the commercial product Goof Off Rust and Stain Remover, according to its MSDS, contains 10% oxalic acid so I would start with a 10% -12% solution (~0.8 -1 lb in 1 gal, 8.3 lbs water); and if that does not work increase the concentration in 10% increments. **Q: how soon can a pet walk on the deck after using?** A: Depends on how much you love them, I guess. Actually, it should be okay after a good thorough rinsing. Don't let them drink any puddled water, though. It usually degrades in the environment in less than a day. **Q: Is this product Oxalic Acid Dihydrate?** A: You would have to call Florida Laboratories Inc. and ask them, as their packaging only shows the product as Oxalic Acid 99.6%. www.flalab.com **Q: Will this acid clean rust stains from well water iron on my driveway?** A: use of Oxalic acid for rust removal on driveways ## Customer Reviews ### ⭐⭐⭐⭐⭐ Rustaid Shame On You, This Product WORKS THE SAME!!! *by M***E on December 25, 2023* Why spend $14.99 on Rustaid from a big box store when Oxalic Acid is the same active "Main" ingredient. I can make 6 gallons with one 5lb bag and save a pile of money. If you have any PVC products, fencing or siding covered with rust water stains USE THIS!!! Make a 10% solution (13.3 ounces or 377 grams powder per gallon of warm water). Just like Rustaid within seconds the rust stains start to disappear. Dissolves quickly in warm water and I use a 2 or 3 gallon sprayer. I have been using this stuff for several years in my Real Estate Post Sign business (We Use PVC Posts). Every truck that goes out has a bottle of this stuff with them. ### ⭐⭐⭐⭐⭐ Use it cautiously *by A***R on August 6, 2024* This is something that will clean toilet tanks and bowls but use it cautiously and with gloves. It is very corrosive to skin. I use it as if it's comet. Turn off the water, flush and then scrub the bowl and tank Turn water back on, Let the tank soak abt 20 mins and flush a few times. You can get water spots of glass with this too and clean showers (porcelein) and tubs. I wouldn't use it on fiberglass or other similar products. ### ⭐⭐⭐⭐⭐ Recommended *by C***S on July 18, 2025* Easy to use. Typical purity. Good quality. Normal appearance. will buy again. ## Frequently Bought Together - OXALIC Acid 99.6% 5 Lb. Deck, Crystals, Metal Cleaning- Rust Removal, Wood Stain Remover and More! - SimpleNature 100% Pure Vegetable Glycerin - 32 oz - Natural Pure Food/Cosmetic Grade for Skincare, Haircare, Cosmetics, Soapmaking, Crafts - Softening & Moisturizing Multipurpose Humectant - US+ 100% Pure Vegetable Glycerin - Pharmaceutical & Food Grade (USP) - Premium Quality All-Natural Moisturizer & Cleanser - For skin, hair, soaps & more (1 Gallon) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hr/products/18741727-oxalic-acid-99-6-5-lb-deck-crystals-metal-cleaning](https://www.desertcart.hr/products/18741727-oxalic-acid-99-6-5-lb-deck-crystals-metal-cleaning) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-07-07*