---
product_id: 469830173
title: "Fernox 57883 F4 Central Heating Leak Sealer - 1 Pint, White"
brand: "fernox"
price: "A$13"
currency: AUD
in_stock: false
reviews_count: 1
url: https://www.desertcart.com.au/products/469830173-fernox-57883-f4-central-heating-leak-sealer-1-pint-white
store_origin: AU
region: Australia
---

# Permanent, no reapplication Seals leaks fast Treats up to 130L system Fernox 57883 F4 Central Heating Leak Sealer - 1 Pint, White

**Brand:** fernox
**Price:** A$13
**Availability:** ❌ Out of Stock

## Summary

> 💧 Seal leaks like a pro, keep your heat flowing!

## Quick Answers

- **What is this?** Fernox 57883 F4 Central Heating Leak Sealer - 1 Pint, White by fernox
- **How much does it cost?** A$13 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/469830173-fernox-57883-f4-central-heating-leak-sealer-1-pint-white)

## 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

- • **Effortless Application:** Simply add to your system and let it work silently in the background
- • **Set and Forget Formula:** Leaves a permanent seal inside your system—no need for repeated treatments
- • **Powerful 1 Pint Concentrate:** Treats large 130-liter central heating systems with ease
- • **Stop Pressure Loss Instantly:** Fixes small leaks and weeps that cause boiler breakdowns
- • **Protect Your Boiler’s Lifespan:** Prevents costly pressure drops and system failures before they happen

## Overview

Fernox 57883 F4 Central Heating Leak Sealer is a concentrated, fast-acting liquid solution designed to permanently seal small leaks and weeps in central heating systems up to 130 liters. Packaged in a convenient 1 pint bottle, it prevents pressure loss and boiler breakdowns by working continuously inside the system.

## Description

Leak Sealer F4 is a internal leak sealer developed for use throughout a central heating system to seal small, inaccessible leaks and weeps which may cause pressure loss and boiler breakdown. Comes in a 1 Pint bottle and treats 130 Liters. Concentrated, fast-acting formula.

## Features

- Fixes system pressure loss due to weeps and leaks
- 1 Pint bottle
- Treats 130 Liters
- Easy to use - leave in the system permanently

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Fernox |
| Style | Fernox 57883 F4 Central Heating Leak Sealer - 1 Pint |
| Item Form | Liquid |
| Unit Count | 1.0 Count |
| Number of Items | 1 |
| Color | White |
| Manufacturer | Fernox |
| Model | 57883 |
| Item Weight | 1.23 pounds |
| Package Dimensions | 7.32 x 5.24 x 2.17 inches |
| Item model number | 57883 |
| Manufacturer Part Number | 57883 |

## Product Details

- **Brand:** Fernox
- **Style:** Fernox 57883 F4 Central Heating Leak Sealer - 1 Pint
- **Item Form:** Liquid
- **Unit Count:** 1.0 Count
- **Number of Items:** 1

## Images

![Fernox 57883 F4 Central Heating Leak Sealer - 1 Pint, White - Image 1](https://m.media-amazon.com/images/I/71mxPf2yANL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Buy
*by F***N on April 5, 2025*

Works great. Works fast. Our pressure steady now.

## Frequently Bought Together

- Fernox 57883 F4 Central Heating Leak Sealer - 1 Pint, White
- Fernox 56599 F1 500 ml Central Heating Protector

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**Shop now:** [https://www.desertcart.com.au/products/469830173-fernox-57883-f4-central-heating-leak-sealer-1-pint-white](https://www.desertcart.com.au/products/469830173-fernox-57883-f4-central-heating-leak-sealer-1-pint-white)

---

*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-01-24*