--- product_id: 202294475 title: "CW1 Central Heating System Inhibitor & Protector - Treats Upto 18 Radiators - Rust, Limescale, Sludge & Corrosion Preventer & Protection Treatment Fluid for Boilers & Underfloor Heating" brand: "coswarm" price: "AR$276860" currency: ARS in_stock: true reviews_count: 13 url: https://www.desertcart.com.ar/products/202294475-cw1-central-heating-system-inhibitor-and-protector-treats-upto-18 store_origin: AR region: Argentina --- # Non-toxic & biodegradable formula Treats up to 18 radiators Prevents rust, limescale & corrosion CW1 Central Heating System Inhibitor & Protector - Treats Upto 18 Radiators - Rust, Limescale, Sludge & Corrosion Preventer & Protection Treatment Fluid for Boilers & Underfloor Heating **Brand:** coswarm **Price:** AR$276860 **Availability:** ✅ In Stock ## Summary > 🛠️ Protect your heat, save your wallet, and stay green with CW1! ## Quick Answers - **What is this?** CW1 Central Heating System Inhibitor & Protector - Treats Upto 18 Radiators - Rust, Limescale, Sludge & Corrosion Preventer & Protection Treatment Fluid for Boilers & Underfloor Heating by coswarm - **How much does it cost?** AR$276860 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.ar](https://www.desertcart.com.ar/products/202294475-cw1-central-heating-system-inhibitor-and-protector-treats-upto-18) ## Best For - coswarm enthusiasts ## Why This Product - Trusted coswarm brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Eco-Friendly Power:** Non-toxic, pH-balanced, and biodegradable—protect your home and the planet simultaneously. - • **Universal Compatibility:** Safe for all metals including aluminium, copper, and stainless steel—perfect for any modern or older system. - • **Maximize Boiler Longevity:** Protect your heating system from costly corrosion and scale buildup with a single 500ml dose. - • **Trusted Safety Certification:** NSF certified for peace of mind, ensuring rigorous independent quality and safety standards. - • **Super Concentrated Efficiency:** Treats up to 18 radiators (150L system) with no need for additional additives or containment. ## Overview CosWarm CW1 Central Heating System Inhibitor is a highly concentrated, NSF-certified treatment fluid designed to protect boilers and underfloor heating systems from rust, limescale, sludge, and corrosion. Suitable for all metals and heating setups, its non-toxic and biodegradable formula treats up to 18 radiators per 500ml bottle, ensuring long-lasting, efficient heating performance while being safe for people and the environment. ## Description Product Description Highly Concentrated Formula 500 ml of CosWarm CW1 boiler limescale inhibitor can treat up to 18 single radiators (150-litre system). It works for all metals, including aluminium, ferrous metals, copper, copper alloys, and stainless steel. Non-Toxic CosWarm CW1 is pH-balanced, non-toxic and safe to use around people and pipes. It is a safer alternative to other toxic, chemical formulas. With CosWarm CW1, power meets green! Fast & Efficient CosWarm CW1 is formulated to inhibit scale and sludge formation, better than muriatic or sulfonic acids. With this revolutionary formula, you can get the job done quickly, easily and safely. Review: Effective but pricey - Repeat purchase so found it effective, although quite expensive and I have used cheaper products in the past with similar result. Would still purchase again but haven't been able to find recently. Review: Good stuff. - Does the job. ## Features - Contains 1,2-benzisothiazol-3(2H)-one. May produce an allergic reaction. - Safety data sheet available on request. - EXTEND THE LIFE OF YOUR BOILERS with CosWarm CW1 boiler corrosion inhibitor and rust prevention liquid. This revolutionary formula protects your system from scale formation, corrosion buildup and provides continuous protection. It stops frequent venting of radiators and ensures long-lasting and smooth working of boilers. - SUITABLE FOR EXISTING & NEW HEATER SYSTEMS: CosWarm CW1 steam boiler inhibitor for central heating can be used for all types of boiler, radiators and pipework systems. Our boiler limescale and rust preventer is compatible with all metals and materials (including aluminium) commonly used in central heating systems. - NON-TOXIC & BIODEGRADABLE: With CosWarm CW1 central heating inhibitors, power meets green. The biodegradable formula is safe for your boilers as well as the Earth. Our boiler rust and corrosion inhibitor is non-toxic and is safer to use around pipes, people and the environment than other toxic and acidic boiler inhibitors. - SUPER CONCENTRATED FORMULA: Our highly concentrated radiator inhibitor fluid treats much more and requires no secondary containment for it to work. 500 ml of CosWarm CW1 heating system inhibitor can treat up to 18 single radiators (150-litre system). - NSF CERTIFIED FOR SAFETY: Millions of customers take it as a mark of quality assurance because every aspect of a product’s development is thoroughly evaluated by one of today’s most respected independent product testing organisations. ## Technical Specifications | Specification | Value | |---------------|-------| | Asin | B086DV7PD5 | | Batteries Included | No | | Batteries Required | No | | Best Sellers Rank | 496,584 in DIY & Tools (See Top 100 in DIY & Tools) 3,965 in Central Heating System Accessories | | Customer Reviews | 4.4 4.4 out of 5 stars (348) 4.4 out of 5 stars | | Date First Available | 26 Mar. 2020 | | Item Weight | 500 g | | Manufacturer | CosWarm | | Manufacturer Reference | CW1-AU | | Part Number | CW1-AU | | Product Dimensions | 18.3 x 8.7 x 5.8 cm; 500 g | ## Images ![CW1 Central Heating System Inhibitor & Protector - Treats Upto 18 Radiators - Rust, Limescale, Sludge & Corrosion Preventer & Protection Treatment Fluid for Boilers & Underfloor Heating - Image 1](https://m.media-amazon.com/images/I/61XPeGavngL.jpg) ![CW1 Central Heating System Inhibitor & Protector - Treats Upto 18 Radiators - Rust, Limescale, Sludge & Corrosion Preventer & Protection Treatment Fluid for Boilers & Underfloor Heating - Image 2](https://m.media-amazon.com/images/I/61wcUQS48ZL.jpg) ![CW1 Central Heating System Inhibitor & Protector - Treats Upto 18 Radiators - Rust, Limescale, Sludge & Corrosion Preventer & Protection Treatment Fluid for Boilers & Underfloor Heating - Image 3](https://m.media-amazon.com/images/I/616up97tsIL.jpg) ![CW1 Central Heating System Inhibitor & Protector - Treats Upto 18 Radiators - Rust, Limescale, Sludge & Corrosion Preventer & Protection Treatment Fluid for Boilers & Underfloor Heating - Image 4](https://m.media-amazon.com/images/I/41XVxUPbZmL.jpg) ![CW1 Central Heating System Inhibitor & Protector - Treats Upto 18 Radiators - Rust, Limescale, Sludge & Corrosion Preventer & Protection Treatment Fluid for Boilers & Underfloor Heating - Image 5](https://m.media-amazon.com/images/I/51XzsG6KYSL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Effective but pricey *by P***Y on 7 June 2026* Repeat purchase so found it effective, although quite expensive and I have used cheaper products in the past with similar result. Would still purchase again but haven't been able to find recently. ### ⭐⭐⭐⭐⭐ Good stuff. *by A***K on 12 May 2025* Does the job. ### ⭐⭐⭐⭐ Easy to use and good value *by B***K on 5 April 2021* Product arrived on time and appears better value than many competitors. 500 ml treats up to 18 radiators, most competitors sell 1L bottles that only treat 10. Assuming it does what it says on the bottle, it’s excellent value. Very easy to add to the heating system. ## Frequently Bought Together - CosWarm CW1 Central Heating Inhibitor & Protector | Treats Up to 18 Radiators | Boiler Water Chemicals | Prevents Rust, Corrosion & Scale in Boilers, Hot Water Systems & Hydronic Heating Systems - CosWarm CW3 Central Heating System Cleaner | Treats Up To18 Radiators | Boiler, Radiator & Pipe System Cleaning & Descaling Solution | Cleans & Removes Rust, Debris, Scale, Sludge | Underfloor - CosWarm CW2 Central Heating System Silencer – Boiler & Radiator Noise Reducer Absorber & Dosing Liquid for Closed Loop System, Hydronic System – Reduces Boiler Noise - For 18 Single Radiators --- ## 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.com.ar/products/202294475-cw1-central-heating-system-inhibitor-and-protector-treats-upto-18](https://www.desertcart.com.ar/products/202294475-cw1-central-heating-system-inhibitor-and-protector-treats-upto-18) --- *Product available on Desertcart Argentina* *Store origin: AR* *Last updated: 2026-09-22*