--- product_id: 6077112 title: "Brownell Formula 44/40 Instant Gun Blue" brand: "brownells" price: "€ 33.51" currency: EUR in_stock: true reviews_count: 8 url: https://www.desertcart.be/products/6077112-brownell-formula-44-40-instant-gun-blue store_origin: BE region: Belgium --- # Fast-acting chemical formula Instant deep blue finish Compact 2.5" x 1" bottle Brownell Formula 44/40 Instant Gun Blue **Brand:** brownells **Price:** € 33.51 **Availability:** βœ… In Stock ## Summary > πŸ”΅ Elevate your gun care game with instant, flawless blueing! ## Quick Answers - **What is this?** Brownell Formula 44/40 Instant Gun Blue by brownells - **How much does it cost?** € 33.51 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.be](https://www.desertcart.be/products/6077112-brownell-formula-44-40-instant-gun-blue) ## Best For - brownells enthusiasts ## Why This Product - Trusted brownells brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Compact & Portable:** Small 2.5" x 1" bottle fits perfectly in your toolkit or range bag. - β€’ **Trusted Brand Quality:** Brownells Formula 44/40, rated 4.6 stars by over 1,100 users. - β€’ **Hazardous but Essential:** Non-returnable due to chemical natureβ€”get it now or miss out on flawless gun care. - β€’ **Precision Instant Blueing:** Achieve a professional, corrosion-resistant blue finish in seconds. - β€’ **Superior Steel Protection:** Specifically formulated for steel to prevent rust and wear. ## Overview Brownell Formula 44/40 Instant Gun Blue is a fast-acting, compact liquid solution designed to provide a professional-grade blue finish on steel firearms. Trusted by over 1,100 users with a 4.6-star rating, this product offers superior corrosion resistance and is a must-have for serious gun enthusiasts and professionals. Note: This hazardous chemical is non-returnable, so secure yours today. ## Description ["https://m.media-desertcart.com/images/S/aplus-media-library-service-media/e7aa9175-cbca-44ba-ad2e-fda3f0f66b52.__CR0,0,1464,625_PT0_SX1464_V1___.jpg", "https://m.media-desertcart.com/images/S/aplus-media-library-service-media/2f451de4-89c7-4657-aeee-74ba44e8acdf.__CR0,0,362,453_PT0_SX362_V1___.jpg", "https://m.media-desertcart.com/images/S/aplus-media-library-service-media/c54d19dc-86cd-4864-b582-76a9ff04a7fd.__CR0,0,362,453_PT0_SX362_V1___.jpg", "https://m.media-desertcart.com/images/S/aplus-media-library-service-media/d44596a6-858a-4376-b734-5de03cc9085e.__AC_SR166,182___.jpg", "https://m.media-desertcart.com/images/S/aplus-media-library-service-media/990c7a06-67ea-4860-bbc8-02c34d6c110e.__AC_SR166,182___.jpg", "https://m.media-desertcart.com/images/S/aplus-media-library-service-media/e931018c-edcc-437e-b55c-ce594741f5a5.__AC_SR166,182___.jpg", "https://m.media-desertcart.com/images/S/aplus-media-library-service-media/e159a2b4-f9b6-4156-8d4a-8b4086631f47.__AC_SR166,182___.jpg", "https://m.media-desertcart.com/images/S/aplus-media-library-service-media/adb32ca4-00d3-48be-9c67-d62e1bc1aef0.__CR0,0,362,453_PT0_SX362_V1___.jpg", "https://m.media-desertcart.com/images/S/aplus-media-library-service-media/be281e69-1571-4780-b89f-c09651ba4dc9.__AC_SR166,182___.jpg", "https://m.media-desertcart.com/images/S/aplus-media-library-service-media/817cf7c7-97d7-42ae-b9ed-61515aaca90f.__AC_SR166,182___.jpg", "https://m.media-desertcart.com/images/S/aplus-media-library-service-media/c372fe3b-39f0-4944-92b7-4ad32bd8eff4.__AC_SR166,182___.jpg", "https://m.media-desertcart.com/images/S/aplus-media-library-service-media/931e185e-328c-4218-a628-c1ec2d6ea063.__AC_SR166,182___.jpg", "https://m.media-desertcart.com/images/S/aplus-media-library-service-media/95eefe2a-dd57-4488-906d-b8474aba8bd3.__CR0,0,362,453_PT0_SX362_V1___.jpg", "https://m.media-desertcart.com/images/S/aplus-media-library-service-media/c84183f0-6b1c-42f1-8d54-e6d640b24700.__AC_SR166,182___.jpg", "https://m.media-desertcart.com/images/S/aplus-media-library-service-media/5c23fe8c-57a9-469b-93ce-361d1532f05d.__AC_SR166,182___.jpg", "https://m.media-desertcart.com/images/S/aplus-media-library-service-media/5c23fe8c-57a9-469b-93ce-361d1532f05d.__AC_SR166,182___.jpg", "https://m.media-desertcart.com/images/S/aplus-media-library-service-media/c84183f0-6b1c-42f1-8d54-e6d640b24700.__AC_SR166,182___.jpg", "https://m.media-desertcart.com/images/S/aplus-media-library-service-media/7d9b449d-7339-48d9-a817-8b5cfbc99082.__CR0,0,970,300_PT0_SX970_V1___.jpg", "https://m.media-desertcart.com/images/S/aplus-media-library-service-media/4304c633-c0aa-487c-981c-bc8b18eca976.__CR0,0,970,600_PT0_SX970_V1___.jpg", "https://m.media-desertcart.com/images/S/aplus-media-library-service-media/c2c629e9-c7d9-4bd4-b0f9-d4a182d8d228.__CR0,0,970,600_PT0_SX970_V1___.jpg", "https://m.media-desertcart.com/images/S/aplus-media-library-service-media/194fe944-f591-489d-a2d6-2cdf66613265.__CR0,0,970,600_PT0_SX970_V1___.jpg"] ## Features - non-returnable (hazardous) ## Technical Specifications | Specification | Value | |---------------|-------| | Air Gun Power Type | Spring-Piston | | Asin | B00IYZBWC8 | | Barrel Material Type | Aluminum | | Best Sellers Rank | #58,050 in Sports & Outdoors (See Top 100 in Sports & Outdoors) #171 in Gunsmithing Tools | | Brand Name | Brownells | | Color | Blue | | Customer Reviews | 4.6 4.6 out of 5 stars (1,134) 4.6 out of 5 stars | | Frame Material Type | Plastic | | Included Components | Formula 44/40 Instant Liquid Gun Blue for Steel | | Item Dimensions L X W X H | 2.5"L x 1"W x 2.5"H | | Item Type Name | Gun Cleaning Kit | | Item Weight | 0.06 Kilograms | | Manufacturer | Formula 44/40 | | Model Name | 082440002 | | Team Name | Formula 44 | | Upc | 762022610499 | | Warranty Description | Manufacturer Warranty | ## Product Details - **Air Gun Power Type:** Spring-Piston - **Barrel Material Type:** Aluminum - **Brand:** Brownells - **Color:** Blue - **Frame Material:** Plastic - **Item Weight:** 0.06 Kilograms - **Manufacturer:** Formula 44/40 - **Product Dimensions:** 2.5"L x 1"W x 2.5"H - **Team Name:** Formula 44 - **UPC:** 762022610499 ## Images ![Brownell Formula 44/40 Instant Gun Blue - Image 1](https://m.media-amazon.com/images/I/61yWo7zGRaL.jpg) ## Questions & Answers **Q: why is the price of 4440 gun blue 2 times the price of buds gun shope.** A: Because they will charge you $12 for shipping it. **Q: I have a black powder 44 colt that I built from a kit and I want to blue all the metal. will this work on my gun?** A: This product is the best of several "cold blue" products I have used, but mainly for touch up of small areas. It will work best on large pieces if you heat them first with a hair dryer or heat gun. Be sure all traces of oil, even your fingerprints, are removed from the metal before you apply 44/40. Try a second application on small parts first before doing a second coat on the frame and barrel. Since the cold blue is effect an oxidation, be sure to oil everything well when you are satisfied with the coverage. **Q: Is this a liquid or a gel?** A: 44/40 is a liquid. It turns ferrous metals almost black instantly. Takes only a little, so I apply it with a bit of paper towel, sometimes Q-tips. Very satisfying. **Q: Is there enough to do a shotgun barrel?** A: It depends on how well you prep the barrel. I used it on a front sight base where I ground off the sling swivel in conjunction with installing a free float tube. The color wasn't very deep so I did a few coatings. Could be my technique or the cast material of the base. A steel barrel might have a better result. Rock River Arms called this product out in its free float tube instructions. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Works fast *by on Reviewed in the United States May 30, 2026* Absolutely one of the best chemical blueing agents I have ever found. ### ⭐⭐⭐⭐⭐ really is instant *by on Reviewed in the United States June 28, 2023* from what i had seen online from ppl using stuff like this, not this very brand just a solution to black metal, had trouble getting the parts to come out all the same, one would be covered an the next would be blotchy so i didnt know what to expect. when i cut the foil seal off the tip of my blade was blade when i pulled it back so i knew it worked but didnt see how well it worked til i brushed a little onto a toe clamp i had made an it really was instant an didnt take near as much as i expected. i didnt want to dunk the hole part in the solution so i was just brushing it on an this will be the method i use from now on unless i run across a large part or something but this stuff works really well an if ur looking to black some metal parts this works. buying it in small 2oz bottles is probably not the best way if u have alot of parts or large parts but i will be sticking with this brand. ### ⭐⭐⭐⭐ good product priced a little high *by on Reviewed in the United States January 17, 2026* good product ## Frequently Bought Together - Brownell Formula 44/40 Instant Gun Blue - Brownells Oxpho-Blue Liquid Gun Blue, Cold Bluing Solution, Gunsmithing Tools Maintenance Cleaning Supplies, Professional Grade, 4 Fl oz. (118.2 mL) - Homax 10120000 Steel Wool, 12 pad, Grade #0000, Rhodes American, Final Finish --- ## 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.be/products/6077112-brownell-formula-44-40-instant-gun-blue](https://www.desertcart.be/products/6077112-brownell-formula-44-40-instant-gun-blue) --- *Product available on Desertcart Belgium* *Store origin: BE* *Last updated: 2026-07-30*