---
product_id: 50489973
title: "Fernox 56603 Leak Sealer"
brand: "fernox"
price: "2112 DH"
currency: MAD
in_stock: true
reviews_count: 1
category: "Fernox"
url: https://www.desertcart.ma/products/50489973-fernox-56603-leak-sealer
store_origin: MA
region: Morocco
---

# 500ml powerful liquid sealer works on pipes, radiators & floors silicone-based durable formula Fernox 56603 Leak Sealer

**Brand:** fernox
**Price:** 2112 DH
**Availability:** ✅ In Stock

## Summary

> 💧 Seal leaks before they seal your plans!

## Quick Answers

- **What is this?** Fernox 56603 Leak Sealer by fernox
- **How much does it cost?** 2112 DH with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ma](https://www.desertcart.ma/products/50489973-fernox-56603-leak-sealer)

## 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

- • **Instant Leak Defense:** Seals central heating leaks fast to keep your system running smoothly.
- • **Trusted Brand Quality:** Fernox, a leader in heating system care, guarantees reliability and performance.
- • **Versatile Application:** Perfect for pipes, radiators, and radiant floor heating systems—one solution for all.
- • **Compact & Ready-to-Use:** 500ml bottle designed for easy handling and precise application.
- • **Water-Resistant Formula:** Silicone-based sealant ensures long-lasting protection against water damage.

## Overview

Fernox 56603 Leak Sealer is a 500ml silicone-based liquid designed to quickly and effectively seal leaks in central heating systems, including pipes, radiators, and radiant floors. Compact and water-resistant, it offers a reliable, easy-to-use solution trusted by professionals to maintain heating efficiency and prevent costly repairs.

## Description

Fernox Central Heating Leak Sealer F4 500ml

Review: Works good - Works good

## Features

- Fernox Central Heating Leak Sealer F4 500ml

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00BL8CX14 |
| Best Sellers Rank | #1,316,773 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #2,518 in Hardware Sealers |
| Brand | Fernox |
| Color | Red |
| Date First Available | February 18, 2021 |
| Global Trade Identification Number | 05014551999800, 05054480290197 |
| Is Discontinued By Manufacturer | No |
| Item Form | Liquid |
| Item Weight | 1.21 pounds |
| Item dimensions L x W x H | 8.27 x 3.86 x 2.68 inches |
| Item model number | 56603 |
| Manufacturer | Fernox |
| Material | Silicone |
| Number of Items | 1 |
| Product Dimensions | 8.27 x 3.86 x 2.68 inches |
| Style | Compact |
| Surface Recommendation | Pipe, Radiator, Radiant Floor |
| UPC | 798256172106 |
| Unit Count | 16.907 Fluid Ounces |
| Water Resistance Level | Water Resistant |

## Product Details

- **Brand:** Fernox
- **Item dimensions L x W x H:** 8.27 x 3.86 x 2.68 inches
- **Material:** Silicone
- **Style:** Compact
- **Water Resistance Level:** Water Resistant

## Images

![Fernox 56603 Leak Sealer - Image 1](https://m.media-amazon.com/images/I/41E5s6gA6zL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works good
*by B***. on July 19, 2025*

Works good

## Frequently Bought Together

- Fernox 56603 Leak Sealer
- Watts ETX-30 Non-Potable Water Carbon Steel Expansion Tank for Closed Loop Hydronic Heating System Piping, 1/2" MNPT Connection, Tank Volume 4.7 Gallons, Maximum Pressure 75 psi
- Fernox 57883 F4 Central Heating Leak Sealer - 1 Pint, White

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**Shop now:** [https://www.desertcart.ma/products/50489973-fernox-56603-leak-sealer](https://www.desertcart.ma/products/50489973-fernox-56603-leak-sealer)

---

*Product available on Desertcart Morocco*
*Store origin: MA*
*Last updated: 2026-02-23*