--- product_id: 76121036 title: "61033 5L Alphi-11 Anti-Freeze Protector" brand: "fernox" price: "€ 212.62" currency: EUR in_stock: true reviews_count: 4 url: https://www.desertcart.be/products/76121036-61033-5l-alphi-11-anti-freeze-protector store_origin: BE region: Belgium --- # Universal metal compatibility Protects down to -22°C Corrosion & limescale defense 61033 5L Alphi-11 Anti-Freeze Protector **Brand:** fernox **Price:** € 212.62 **Availability:** ✅ In Stock ## Summary > 🛠️ Stay cool, stay protected — antifreeze that works as hard as you do! ## Quick Answers - **What is this?** 61033 5L Alphi-11 Anti-Freeze Protector by fernox - **How much does it cost?** € 212.62 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/76121036-61033-5l-alphi-11-anti-freeze-protector) ## Best For - fernox enthusiasts ## Why This Product - Trusted fernox brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Easy Maintenance:** Compatible with Fernox test kits for hassle-free annual system checks and peace of mind. - • **Eco-Smart Formula:** Non-toxic and environmentally friendly, because sustainability matters in every drop. - • **Limescale? Not Here!:** Prevents scale buildup to maintain peak heating and chilled water efficiency. - • **Freeze-Proof Confidence:** Reliable protection from -11°C to -22°C keeps your system running no matter the chill. - • **Ultimate Corrosion Shield:** Advanced inhibitors guard all metals—copper, aluminum, ferrous—against costly damage. ## Overview Fernox 61033 Alphi-11 is a 5L combined antifreeze and corrosion inhibitor designed for domestic central heating and chilled water systems. It protects all common metals from corrosion and limescale, ensuring system efficiency and longevity down to -22°C. Non-toxic and environmentally friendly, it supports easy maintenance with compatible test kits. ## Description Product Description Fernox antifreeze protector Alphi 11 protects against corrosion and limescale. Combined antifreeze and protector. Protects heating and chilled water. Maintains efficiency so extending system life. Compatible with all metals and materials commonly used in heating systems. Non-toxic, environmentally friendly. Volume: 5 litres. Fernox Protector Alphi-11 is a combined antifreeze and inhibitor, which gives long term protection of domestic central heating systems against internal corrosion and limescale formation. It prevents corrosion of all metals found in these systems, i.e. ferrous metals, copper and copper alloys and aluminium. Fernox Protector Alphi-11 is compatible with all metals and materials commonly used in central heating systems. For continued protection we recommend Protector levels are checked regularly (annually). The concentration of the product can be easily measured on site using a Fernox Protector Test Kit. Box Contains 1 x Antifreeze Protector Alphi-11 bottle ## Features - Combined antifreeze and inhibitor - Protects against corrosion and limescale - Protects heating and chilled water systems - Will protect from -11C to -22C - Compatible with all metals and materials commonly used in heating systems ## Technical Specifications | Specification | Value | |---------------|-------| | Asin | B00BL8CR6A | | Batteries Included | No | | Batteries Required | No | | Customer Reviews | 4.8 4.8 out of 5 stars (9) 4.8 out of 5 stars | | Date First Available | 24 Mar. 2014 | | Delivery Information | We cannot deliver certain products outside mainland UK ( Details). We will only be able to confirm if this product can be delivered to your chosen address when you enter your delivery address at checkout. | | Guaranteed Software Updates Until | unknown | | Item Model Number | 61033 | | Item Package Quantity | 1 | | Item Weight | 5.42 kg | | Manufacturer | Fernox | | Number Of Pieces | 1 | | Package Dimensions | 29.8 x 19.8 x 14.6 cm; 5.42 kg | | Part Number | 61033 | ## Images ![61033 5L Alphi-11 Anti-Freeze Protector - Image 1](https://m.media-amazon.com/images/I/81pqiVyi3VL.jpg) ## Questions & Answers **Q: Can you please confirm what temperature it protects from as not sure it is wrong in the description "Will protect from -11C to -22C" should not be -1?** A: I don't think it matters whether its -1 or -11 as it protects down to -22 anyway! It is designed to stop your system freezing up especially if you are away from home and don't leave the boiler on. **Q: is this concertrated or do i have to dilute it** A: Its concentrated and can be poured straight into the system via a radiator or the top of the boiler having let out an equivalent amount of water from the system first. You should know roughly how much water is in the system so that you can get the percentage concentration correct as per the instructions. **Q: I have 8 large radiaters and 4 small radiaters. How much doeses or quantity should I use to fill the systelm after cleaned? Thanks** A: This is antifreeze protection used in caravans, lodges and other badly insulted accommodation. It would not normal be used in a house. Since you have not given the volume of the system small house 1 big house 2, 5 litre containers. This is a rule of thumb for actual dose phone Fernox help line. **Q: What colour is the anti-freeze? i have alime green in my caravan and not sure if this is the same product** A: Hi This is a clear liquid I have just used this my self at work. ## Customer Reviews ### ⭐⭐⭐⭐⭐ on time *by on Reviewed in the United Kingdom 13 October 2022* antifreeze in classic car ### ⭐⭐⭐⭐⭐ Fernox has a good name *by on Reviewed in the United Kingdom 18 July 2021* Great value best on the market ### ⭐⭐⭐⭐⭐ Good quality *by on Reviewed in the United Kingdom 29 July 2021* Very good ## Frequently Bought Together - Fernox 61033 5L Alphi-11 Anti-Freeze Protector - Fernox 56599 F1 500 ml Central Heating Protector - Just Dose It Central Heating Dosing Tool, Radiator Dosing Funnel - For Adding Chemicals Like Fernox Central Heating Inhibitor, Sludge Remover, Leak Sealer & Sentinel X100 --- ## 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/76121036-61033-5l-alphi-11-anti-freeze-protector](https://www.desertcart.be/products/76121036-61033-5l-alphi-11-anti-freeze-protector) --- *Product available on Desertcart Belgium* *Store origin: BE* *Last updated: 2026-09-07*