---
product_id: 50498337
title: "Fernox 56599 500ml F1 Protector"
brand: "fernox"
price: "$126.83"
currency: USD
in_stock: true
reviews_count: 8
category: "Fernox"
url: https://www.desertcart.ec/products/50498337-fernox-56599-500ml-f1-protector
store_origin: EC
region: Ecuador
---

# Up to 15% gas savings with Cleaner F3 Eco-friendly & Carbon Trust certified Corrosion & limescale defense Fernox 56599 500ml F1 Protector

**Brand:** fernox
**Price:** $126.83
**Availability:** ✅ In Stock

## Summary

> 🔥 Heat smarter, save bigger, and protect forever 🛠️

## Quick Answers

- **What is this?** Fernox 56599 500ml F1 Protector by fernox
- **How much does it cost?** $126.83 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ec](https://www.desertcart.ec/products/50498337-fernox-56599-500ml-f1-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

- • **Silent Comfort:** Prevents noisy boilers and sticking pumps for a peaceful home environment.
- • **Eco-Conscious Heating:** Non-toxic formula with Carbon Trust certification aligns with your green lifestyle.
- • **Fuel-Smart Efficiency:** Combine with Cleaner F3 to slash gas bills by up to 15%—heat smarter, not harder.
- • **Maintenance Made Easy:** Reduces costly repairs and frequent radiator venting—save time and money annually.
- • **Ultimate System Shield:** Protects all metals in your heating system from corrosion and limescale buildup.

## Overview

Fernox 56599 500ml F1 Protector is a premium liquid additive designed to safeguard mixed-metal central heating systems from corrosion and limescale. Compatible with all common metals and materials, it enhances system efficiency and longevity. When paired with Fernox Cleaner F3, users can achieve up to 15% gas savings. Certified by the Carbon Trust, this eco-friendly formula reduces maintenance costs, prevents boiler noise, and supports a quieter, more efficient heating experience.

## Description

Product Description Fernox protector F1 liquid protects against corrosion and scale in mixed metal central heating systems. When used in conjunction with Cleaner F3 gas savings of up to 15 percent can be achieved every time you heat your room. Carbon Footprint certified by the Carbon Trust. Stops frequent venting of radiators. Prevents sticking pumps and boiler noise. Reduces maintenance costs and saves on fuel bills. Prevents cold spots in radiators. Non toxic, environmentally friendly. Volume: 500ml.Fernox Protector F1 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. It is suitable for all types of boiler, radiators and pipe work systems. Fernox Protector F1 is compatible with all metals and materials commonly used in central heating systems. For continued protection we recommend Protector F1 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 Protector F1 Liquid bottle 500ml

Review: great product, saved me calling a plumber - I was experiencing some problems with my heating system and the boiler kept cutting out, a friend suggested that I may have a blockage in the pipe especially since one of the radiators produced black water when I released some water from it, so I purchased some Fernox F3 cleaner and ran that through the system for a few days and then once fully flushed out I refilled using this F1 protector, and so far the boiler was worked perfectly and think its even making less noise than it did before. If this continues to be a success I plan to clean and protect on an annual basis to ensure the heating system is it good condition. There are other brands on the market but I chose Fernox as an internet search showed it had a good reputation and so far I have not been disappointed and so I will continue to use Fernox. Using this product and a weekend of my time has saved me a big plumbers expense.
Review: A Reliable Corrosion Inhibitor for Central Heating Systems - We have used this Fernox F1 protector fluid in our central heating system for many years and find it excellent as a corrosion/rust preventative.

## Features

- Contains benzisothiazolone. May produce an allergic reaction.
- Protects against corrosion and limescale in central heating systems
- When used in conjunction with Cleaner F3 gas savings of up to 15% can be achieved
- Reduces maintenance costs and saves on fuel bills
- Treats 100L system or up to 10 single radiators
- Compatible with all metals and materials commonly used in central heating systems

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00BL8CVZM |
| Batteries Required? | No |
| Batteries included? | No |
| Best Sellers Rank | 32,131 in Garden ( See Top 100 in Garden ) 55 in Patio Heaters |
| Customer Reviews | 4.6 4.6 out of 5 stars (90) |
| Date First Available | 21 Feb. 2013 |
| Item Package Quantity | 1 |
| Item Weight | 658 g |
| Item model number | 56599 |
| Manufacturer | Fernox |
| Package Dimensions | 20.8 x 9.8 x 6.8 cm; 658 g |
| Part Number | 56599 |
| Power Source | Gas Powered |

## Images

![Fernox 56599 500ml F1 Protector - Image 1](https://m.media-amazon.com/images/I/417Zvn+jp1L.jpg)
![Fernox 56599 500ml F1 Protector - Image 2](https://m.media-amazon.com/images/I/81aL6yd2EBL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ great product, saved me calling a plumber
*by S***A on 21 September 2016*

I was experiencing some problems with my heating system and the boiler kept cutting out, a friend suggested that I may have a blockage in the pipe especially since one of the radiators produced black water when I released some water from it, so I purchased some Fernox F3 cleaner and ran that through the system for a few days and then once fully flushed out I refilled using this F1 protector, and so far the boiler was worked perfectly and think its even making less noise than it did before. If this continues to be a success I plan to clean and protect on an annual basis to ensure the heating system is it good condition. There are other brands on the market but I chose Fernox as an internet search showed it had a good reputation and so far I have not been disappointed and so I will continue to use Fernox. Using this product and a weekend of my time has saved me a big plumbers expense.

### ⭐⭐⭐⭐⭐ A Reliable Corrosion Inhibitor for Central Heating Systems
*by A***1 on 16 December 2025*

We have used this Fernox F1 protector fluid in our central heating system for many years and find it excellent as a corrosion/rust preventative.

### ⭐⭐⭐⭐⭐ Good Product
*by C***1 on 13 September 2019*

Amazon urged me to review so here goes This kind of product works in the background so its difficult to say how well it works I can only say the water in my rads stays clean and I have never had any blockage etc. As far as I know Fernox is the premium product and you can get cheaper but for the number of times you buy it (once a year) I buy the best

## Frequently Bought Together

- Fernox 56599 500ml F1 Protector
- Fernox 56600 500ml F3 Cleaner
- Just Dose It Central Heating Dosing Tool, Radiator Dosing Funnel - For Adding Chemicals Like Fernox Central Heating Inhibitor, Sludge Remover, Leak Sealer & Sentinel X100

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*Product available on Desertcart Ecuador*
*Store origin: EC*
*Last updated: 2026-01-25*