--- product_id: 42036295 title: "BLACK STAR1x1 Liquid Chemical Rust Converter Sealant Primer for Steel Surfaces Turns Rust into Paintable Black Polymer Coating, 1 Gallon (2 Pack)" brand: "mro chem" price: "Β₯79477" currency: JPY in_stock: true reviews_count: 6 url: https://www.desertcart.jp/products/42036295-black-star1x1-liquid-chemical-rust-converter-sealant-primer-for-steel store_origin: JP region: Japan --- # Paintable Finish Corrosion Resistant 21st Century Tech BLACK STAR1x1 Liquid Chemical Rust Converter Sealant Primer for Steel Surfaces Turns Rust into Paintable Black Polymer Coating, 1 Gallon (2 Pack) **Brand:** mro chem **Price:** Β₯79477 **Availability:** βœ… In Stock ## Summary > πŸ–€ Turn Rust into Resilience with Black Star! ## Quick Answers - **What is this?** BLACK STAR1x1 Liquid Chemical Rust Converter Sealant Primer for Steel Surfaces Turns Rust into Paintable Black Polymer Coating, 1 Gallon (2 Pack) by mro chem - **How much does it cost?** Β₯79477 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/42036295-black-star1x1-liquid-chemical-rust-converter-sealant-primer-for-steel) ## Best For - mro chem enthusiasts ## Why This Product - Trusted mro chem brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Seamless Primer:** Achieve a smooth, vivid paint finish. - β€’ **Permanent Protection:** Never worry about re-rusting again. - β€’ **User-Friendly Formula:** Just spray, brush, or roll on! - β€’ **Versatile Applications:** Perfect for everything that rusts. - β€’ **Transform Rust Effortlessly:** Say goodbye to sanding and scraping! ## Overview The BLACK STAR 1x1 Liquid Chemical Rust Converter is a revolutionary 2-pack solution that transforms rust into a durable black polymer coating. This easy-to-use product not only halts further rust formation but also serves as an excellent primer for painting, making it ideal for a wide range of applications from industrial to personal use. ## Description BLACK STAR1x1 Liquid Chemical Rust Converter Sealant Primer for Steel Surfaces Turns Rust into Paintable Black Polymer Coating, 1 Gallon (2 Pack) ## Features - Black Star Rust Converter – No more sanding, blasting, scraping, or etching. Instead, our 21st century technology converts and transforms rust into a slick polymer resin coating. A phenomenal rust treatment, Black Star rust converter stops more rust from forming. - Won’t Re-Rust – After converting your rust into a beautiful, black, hard, corrosion-resistant polymer resin that seals out moisture, the treated rust will never reoxidize. Instead of being just a harsh rust remover, Black Star is also a rust inhibitor and chemically reacts with the rust to convert it into a useful primer or final coating. - Unlimited uses – If it rusts, Black Star goes to work! Used everywhere from oil rigs to farm equipment. From fences, metal roofs, bridges, marine applications and steel sheds to grain bins, cars, trucks, trailers, and tools, rust is simply no match. - Paint primer – Rust is difficult to paint over, and paint won’t stop your metal from re-rusting. Black Star not only acts as a rust converter and stopper, but also is a phenomenal primer for painting your metal and achieving a vivid, smooth color. - Easy to Use – No more difficult rust removing! Instead of damaging the metal trying to remove rust, just spray, brush, or roll on Black Star Rust Converter and improve the integrity of your metal without worrying about stripping, wire wheeling, grinding or sand blasting. ## Technical Specifications | Specification | Value | |---------------|-------| | Manufacturer | MRO Chem | | Brand | BLACK STAR | | Item Weight | 16 pounds | | Package Dimensions | 14 x 9 x 9 inches | | Is Discontinued By Manufacturer | No | | Manufacturer Part Number | BlackStarRustConverter/2gallons | ## Images ![BLACK STAR1x1 Liquid Chemical Rust Converter Sealant Primer for Steel Surfaces Turns Rust into Paintable Black Polymer Coating, 1 Gallon (2 Pack) - Image 1](https://m.media-amazon.com/images/I/41p1K7kU5WL.jpg) ![BLACK STAR1x1 Liquid Chemical Rust Converter Sealant Primer for Steel Surfaces Turns Rust into Paintable Black Polymer Coating, 1 Gallon (2 Pack) - Image 2](https://m.media-amazon.com/images/I/51Fh74gwkDL.jpg) ![BLACK STAR1x1 Liquid Chemical Rust Converter Sealant Primer for Steel Surfaces Turns Rust into Paintable Black Polymer Coating, 1 Gallon (2 Pack) - Image 3](https://m.media-amazon.com/images/I/51jdbI6H0wL.jpg) ![BLACK STAR1x1 Liquid Chemical Rust Converter Sealant Primer for Steel Surfaces Turns Rust into Paintable Black Polymer Coating, 1 Gallon (2 Pack) - Image 4](https://m.media-amazon.com/images/I/41zFdzl2V-L.jpg) ![BLACK STAR1x1 Liquid Chemical Rust Converter Sealant Primer for Steel Surfaces Turns Rust into Paintable Black Polymer Coating, 1 Gallon (2 Pack) - Image 5](https://m.media-amazon.com/images/I/41lg2xKCrxL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars Miracle Product *by M***K on Reviewed in the United States on March 13, 2019* Miracle liquid right before my very eyes. This stuff works!!I would still recommend banging and brushing scaly rust off, followed by intense power washing, then let dry completely. Spray on with a spray bottle, then spread with a cheap brush. After it is completely cured it may look purplish-Black. Very stubborn areas will need more than 1 coat.After I’m finished, I plan to paint with Rustoleum.Update April 2021: I have found that it periodically needs additional application as new rust forms, but it definitely slows the progression of the rust.1. Power wash, get as much scaling and loose rust off as possible. Thorough, aggressive power wash.2. Tap rust areas with a hammer. Use wire brush if needed.3. Aggressive power wash again.4. Apply liberal coats of black Star using spray bottle and cheap disposable bristle brush.5. Second coat as needed.6. Let dry.7. At this point, you have two options...rustoleum or oil spray. As mentioned above, I went with rustoleum on my undercarriage, followed by lanolin based oil spray. This worked ok, but the rust under the paint did come back....so, yes black star did slow down the process and convert most rust, but it needs to be periodically re-applied, and you can’t do that if there is a film of paint in the way...so I had to power wash again to get the scaling off (a year later). However, I took 3 steps forward and only 1 step back.8. For undercarriages, I would recommend going black star then the lanolin based oil spray route. This also needs to be re-applied, but it gives the appearance of black rustoleum, but the oil acts as a rust dissolver in and of itself and stays moist. EVEN THAT combination of black star and lanolin oil spray must be periodically maintained, but it’s radically reduced the spread of rust.9. Overall still recommend, but it is not a silver bullet...but close, depending on the type of rust you have. It won’t make metal re-appear. ### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars Seems to do exactly what I expected *by R***N on Reviewed in the United States on May 16, 2021* I used this on some 2" tube steel, about 100 running feet worth. It had sporadic rust (some heavy) so I decided to hit it all with a wire brush in a side grinder. I did this, rinsed with water from a nozzle, and let set until the following weekend.It got rained on a couple days in between, so today it was nice and sunny and I wiped it down with an old T shirt and applied the Converter with a brush. It went quickly, and I took pics before, after I finished, and then several hours later, which I have attached. It feels like a painted surface to the touch, and tomorrow I will spray it all with a self-etching primer. I used about 1 quart on this.Hopefully the rust will be stopped now, and I can cut/weld as needed and when convenient, to build my heavy duty work bench. I will be doing the same process to a bunch of 1.5" angle iron for shelving, and some 3/4" tube steel. ### ⭐⭐⭐ 3.0 out of 5 stars Put lots on *by L***G on Reviewed in the United States on May 27, 2024* Good product but really dont know how long it will last ## Frequently Bought Together - BLACK STAR 1x1 Liquid Chemical Rust Converter Sealant Primer for Steel Surfaces Turns Rust into Paintable Black Polymer Coating, 1 Gallon (2 Pack) - TCP Global Air Undercoating Spray Gun with Suction Feed Cup - Apply Sprayable Truck Bed Liner Coating, Rubberized Undercoat, Rust Proofing, Chip Guard Paint - Pneumatic Automotive Application Sprayer --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.jp/products/42036295-black-star1x1-liquid-chemical-rust-converter-sealant-primer-for-steel](https://www.desertcart.jp/products/42036295-black-star1x1-liquid-chemical-rust-converter-sealant-primer-for-steel) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-09-28*