--- product_id: 746649732 title: "Caswell BLACK OXIDE CONCENTRATE 1 QT" brand: "caswell" price: "€ 335.53" currency: EUR in_stock: true reviews_count: 5 category: "Caswell" url: https://www.desertcart.be/products/746649732-caswell-black-oxide-concentrate-1-qt store_origin: BE region: Belgium --- # 1 qt concentrate makes 2.5 gal solution 30 sec to 10 min blackening time 600-1200 sq.ft. coverage/gallon Caswell BLACK OXIDE CONCENTRATE 1 QT **Brand:** caswell **Price:** € 335.53 **Availability:** ✅ In Stock ## Summary > ⚡ Elevate your steel game with Caswell’s powerhouse black oxide concentrate! ## Quick Answers - **What is this?** Caswell BLACK OXIDE CONCENTRATE 1 QT by caswell - **How much does it cost?** € 335.53 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/746649732-caswell-black-oxide-concentrate-1-qt) ## Best For - caswell enthusiasts ## Why This Product - Trusted caswell brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Sealable for Longevity:** Pair with Caswell Sealers to protect your finish and keep your parts looking flawless. - • **Rapid Blackening Action:** Transform steel parts in as little as 30 seconds—speed meets precision. - • **Versatile Dilution Ratio:** Mix 1:9 with distilled water for a potent, ready-to-use solution. - • **Professional-Grade Finish:** Achieve a sleek, durable black oxide finish ideal for knife making and metalwork. - • **Unmatched Surface Coverage:** Blacken up to 1200 sq.ft. per gallon—maximize efficiency and minimize waste. ## Overview Caswell BLACK OXIDE CONCENTRATE 1 QT is a professional liquid solution designed to blacken iron and steel parts (excluding stainless steel) with exceptional coverage of up to 1200 sq.ft. per gallon. It offers rapid blackening in 30 seconds to 10 minutes at room temperature and requires dilution at a 1:9 ratio with distilled water. Ideal for knife makers and metalworkers seeking a durable, sleek finish, it must be sealed post-treatment using Caswell’s sealers for lasting protection. ## Description Blackens steel and iron parts (not stainless steel). Parts must be sealed after blackening. Use our Penetrating Sealer or Caswell Sealer. Mix 1 part Concentrate with 9 parts distilled water. 1 quart of concentrate makes 2.5 gallons of blackening solution. Parts Coverage - 600 to 1200 sq. ft. of surface area blackened per gallon of concentrate. Immerse the part in the mixed Black Oxide Solution and swirl around for between 30 seconds and 5 minutes. Alternatively, the part may simply be placed in the solution for 5 - 10 minutes. Remove the part from the solution and rinse in fresh water. Use at room temperature. Contains Hazardous Goods. Shipping restrictions apply. Ground shipping only to the Continental USA. Please call +1 315 946 1213 or contact us for rates to other locations. Review: A must have for knife making! - As long as your steel is clean this will do wonders for your surface finish! Review: Loved it. - Worked great when used as directed. ## Features - Brand: Caswell - Material: Iron and Steel - Manufacturer: Caswell ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B09MR7SK8L | | Brand | Caswell | | Brand Name | Caswell | | Customer Reviews | 4.5 out of 5 stars 56 Reviews | | Item Form | Liquid | | Item Weight | 2.4 Pounds | | Item form | Liquid | | Item weight | 2.4 Pounds | | Manufacturer | Caswell | | Part Number | BOCONC1Q | | Unit Count | 32.0 Milliliters | | Unit count | 32.0 Milliliters | ## Product Details - **Brand:** Caswell - **Item form:** Liquid - **Item weight:** 2.4 Pounds - **Manufacturer:** Caswell - **Unit count:** 32.0 Milliliters ## Images ![Caswell BLACK OXIDE CONCENTRATE 1 QT - Image 1](https://m.media-amazon.com/images/I/41YqbjCFJ4L.jpg) ## Questions & Answers **Q: Im not sure what type of metal im using it on. It is non magnetic. Will this black oxide harm the metal in any way or will it just not have an affect?** A: If it’s non magnetic, then this will not work. Whether it would harm the metal is dependent on what sort of metal it is. **Q: Will this work on a steel putter head?** A: Yes, as long as it is carbon steel. If you don’t like the final finish, it is as easy as sanding the putter back to its original state. I hope this helps. **Q: Once sealed, can the oil be removed to avoid atracking dust? Looking for something to restore typewriter linkages, and they must be assembled "dry".** A: This product is just the blackener. The sealer is not included. If you want a dry finish, seal it with our "Caswell Sealer" as opposed to the oily penetrating sealer. **Q: Will this work on Aluminum Alloy ?** A: This will not work for aluminum. There is another product that you can order online that will darken aluminum. I do not remember the name specifically. ## Customer Reviews ### ⭐⭐⭐⭐⭐ A must have for knife making! *by L***N on 5 December 2025* As long as your steel is clean this will do wonders for your surface finish! ### ⭐⭐⭐⭐⭐ Loved it. *by C***U on 12 September 2025* Worked great when used as directed. ### ⭐⭐⭐⭐⭐ As advertised *by G***M on 10 June 2026* Excellent Product ## Frequently Bought Together - Caswell BLACK OXIDE CONCENTRATE 1 QT - Caswell PENETRATING SEALER 1QT - Caswell Black Oxide Activator 1 Pint (Makes 1.25 Gallons) --- ## 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.be/products/746649732-caswell-black-oxide-concentrate-1-qt](https://www.desertcart.be/products/746649732-caswell-black-oxide-concentrate-1-qt) --- *Product available on Desertcart Belgium* *Store origin: BE* *Last updated: 2026-08-11*