---
product_id: 476383443
title: "Fernox 57883 F4 Central Heating Leak Sealer - 1 Pint"
brand: "fernox"
price: "R11"
currency: ZAR
in_stock: false
url: https://www.desertcart.co.za/products/476383443-fernox-57883-f4-central-heating-leak-sealer-1-pint
store_origin: ZA
region: South Africa
---

# Seals leaks fast Treats up to 130L Permanent system fix Fernox 57883 F4 Central Heating Leak Sealer - 1 Pint

**Brand:** fernox
**Price:** R11
**Availability:** ❌ Out of Stock

## Summary

> 💧 Seal the deal on leaks before they seal your comfort!

## Quick Answers

- **What is this?** Fernox 57883 F4 Central Heating Leak Sealer - 1 Pint by fernox
- **How much does it cost?** R11 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/476383443-fernox-57883-f4-central-heating-leak-sealer-1-pint)

## 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

- • **Set and forget:** Easy to use and stays in the system permanently—no repeat treatments needed
- • **Trusted by pros:** Fernox quality ensures reliable, professional-grade leak sealing
- • **Compact powerhouse:** Lightweight 558g bottle fits seamlessly into your maintenance routine
- • **Leak-proof your comfort:** Stops pressure loss from pesky weeps and leaks instantly
- • **One bottle, long-term peace:** Just one pint treats up to 130 liters of central heating system

## Overview

Fernox 57883 F4 Central Heating Leak Sealer is a professional-grade, easy-to-use solution designed to permanently fix pressure loss caused by leaks in central heating systems. One pint treats up to 130 liters, providing a long-lasting, hassle-free seal that keeps your heating system efficient and reliable.

## 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 |
|---------------|-------|
| Manufacturer | Fernox |
| Brand | Fernox |
| Model | 57883 |
| Package Dimensions | 18.59 x 13.31 x 5.51 cm; 558 g |
| Item model number | 57883 |
| Manufacturer Part Number | 57883 |
| Item Weight | 558 g |

## Product Details

- **Brand:** Fernox
- **Style:** Fernox 57883 F4 Central Heating Leak Sealer - 1 Pint
- **Number of Items:** 1
- **Colour:** White

## Images

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

## 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.co.za/products/476383443-fernox-57883-f4-central-heating-leak-sealer-1-pint](https://www.desertcart.co.za/products/476383443-fernox-57883-f4-central-heating-leak-sealer-1-pint)

---

*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-02-16*