---
product_id: 48819830
title: "Sentinel - X100 Inhibitor 1L, Market Leading Heavy Duty Central Heating Inhibitor, Protection Against Corrosion and limescale, ensures Maximum Heating Efficiency and extends System Life, Clear (88000)"
brand: "sentinel"
price: "¥11230"
currency: JPY
in_stock: true
category: "Sentinel"
url: https://www.desertcart.jp/products/48819830-sentinel-x100-inhibitor-1l-market-leading-heavy-duty-central-heating
store_origin: JP
region: Japan
---

# Maximizes heating efficiency & fuel savings pH-neutral, safe for all system types Heavy-duty corrosion & limescale defense Sentinel - X100 Inhibitor 1L, Market Leading Heavy Duty Central Heating Inhibitor, Protection Against Corrosion and limescale, ensures Maximum Heating Efficiency and extends System Life, Clear (88000)

**Brand:** sentinel
**Price:** ¥11230
**Availability:** ✅ In Stock

## Summary

> 🛠️ Keep your heat flowing, your bills low, and your system future-proof!

## Quick Answers

- **What is this?** Sentinel - X100 Inhibitor 1L, Market Leading Heavy Duty Central Heating Inhibitor, Protection Against Corrosion and limescale, ensures Maximum Heating Efficiency and extends System Life, Clear (88000) by sentinel
- **How much does it cost?** ¥11230 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/48819830-sentinel-x100-inhibitor-1l-market-leading-heavy-duty-central-heating)

## Best For

- sentinel enthusiasts

## Why This Product

- Trusted sentinel brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Dual-Action Formula:** Simultaneously fights corrosion and limescale buildup
- • **Extend System Lifespan:** Prolong your heating system’s life and avoid costly repairs
- • **Fuel Efficiency Booster:** Optimizes heat transfer to slash your energy bills
- • **Safe & Easy Application:** pH-neutral and compatible with all central heating systems
- • **Industry-Standard Protection:** Trusted by all major boiler manufacturers for unbeatable system defense

## Overview

Sentinel X100 Inhibitor is a market-leading, heavy-duty central heating additive that protects your system from corrosion and limescale. Recommended by all major boiler brands, its pH-neutral formula ensures maximum heating efficiency, extends system life, and reduces fuel consumption, making it the essential choice for maintaining a clean, efficient heating system.

## Description

Protect your central heating system against corrosion and limescale with this heavy-duty, pH-neutral inhibitor. Extends system life and ensures maximum efficiency.

## Features

- The industry standard inhibitor, providing protection for clean central heating systems against limescale and corrosion; recommended by all major boiler manufacturers
- Heavy duty inhibitor which protects against limescale and corrosion
- Sentinel X100 Inhibitor will extend the life of the system, ensuring maximum efficiency and minimising fuel usage
- Ensures optimum system efficiency
- pH neutral formulation

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00FFYHBSK |
| Best Sellers Rank | 2,433 in DIY & Tools ( See Top 100 in DIY & Tools ) 29 in Central Heating System Accessories |
| Brand | Sentinel |
| Capacity | 1 litres |
| Colour | Yellow |
| Customer Reviews | 4.6 4.6 out of 5 stars (2,244) |
| Efficiency | A |
| Global Trade Identification Number | 05016402052719 |
| Included Components | Sentinel X100 Inhibitor 1L X100L-12X1L-GB |
| Is Electric | Yes |
| Item Depth | 13.5 centímetros |
| Item Dimensions W x H | 9.7W x 21H centimetres |
| Item Type Name | inhibitor |
| Item Weight | 1.17 Kilograms |
| Manufacturer | Sentinel |
| Material | Plastic |
| Model Number | X100L-12X1L-GB |
| Mount Type | Wall |
| Number of Items | 1 |
| Number of Packs | 1 |
| Part Number | 389100 |
| Power source | Corded Electric |
| Special Features | Wide range of applications and double corrosion and limescale protection |
| Style | Indoor Installation |
| UPC | 798256160639 |
| Unit Count | 1.0 count |

## Product Details

- **Brand:** Sentinel
- **Capacity:** 1 litres
- **Power source:** Corded Electric
- **Product dimensions:** 9.7W x 21H centimetres
- **Special feature:** Wide range of applications and double corrosion and limescale protection

## Images

![Sentinel - X100 Inhibitor 1L, Market Leading Heavy Duty Central Heating Inhibitor, Protection Against Corrosion and limescale, ensures Maximum Heating Efficiency and extends System Life, Clear (88000) - Image 1](https://m.media-amazon.com/images/I/710HAu9DhiL.jpg)
![Sentinel - X100 Inhibitor 1L, Market Leading Heavy Duty Central Heating Inhibitor, Protection Against Corrosion and limescale, ensures Maximum Heating Efficiency and extends System Life, Clear (88000) - Image 2](https://m.media-amazon.com/images/I/41VoLfGRjsL.jpg)
![Sentinel - X100 Inhibitor 1L, Market Leading Heavy Duty Central Heating Inhibitor, Protection Against Corrosion and limescale, ensures Maximum Heating Efficiency and extends System Life, Clear (88000) - Image 3](https://m.media-amazon.com/images/I/41TVZ3M2b3L.jpg)
![Sentinel - X100 Inhibitor 1L, Market Leading Heavy Duty Central Heating Inhibitor, Protection Against Corrosion and limescale, ensures Maximum Heating Efficiency and extends System Life, Clear (88000) - Image 4](https://m.media-amazon.com/images/I/31WAGrMQW1L.jpg)
![Sentinel - X100 Inhibitor 1L, Market Leading Heavy Duty Central Heating Inhibitor, Protection Against Corrosion and limescale, ensures Maximum Heating Efficiency and extends System Life, Clear (88000) - Image 5](https://m.media-amazon.com/images/I/3146FRYuqZL.jpg)

## Questions & Answers

**Q: howmany radiators will it protect**
A: See the Sentinel Site FAQ (http://www.sentinel-solutions.net/product/detail/central-heating/liquids/x100-inhibitor/) where you will find:What dosage should I use?1 litre of Sentinel X100 is sufficient to treat a typical domestic system of up to 10 radiators.Larger systems should be dosed with 2 litres.Hope this helps.

**Q: How is the best way to flush out the system?**
A: Assuming you have a open vented system there should be 2 water tanks in your loft, the smaller tank is the one for central heating, put a stick across it and tie the ball cock to the stick so the tank cannot refill up with water.
SWITCH YOUR CENTRAL HEATING OFF !
On one ground floor radiator you will find a little pipe that has ridges on it to which you can fit a length of garden hose so you can drain the water in the system off. I also use a hose clip as the water will be dirty and could stain you carpet if the hose becomes detached.
Then close the drain trap put the sentinel in the tank and then release the ball cock so the system fills up, you may need to bleed one or more radiators.
Check all the above out on one of the many you tube videos

**Q: do I need to flush out after i apply inhibitor a week later?**
A: No, once you have added the inhibitor to the system it stays in there. If you read the container it tells you what the inhibitor does. ( it treats against corrosion etc and lubricates any moving parts such as the pump) I have used this for over 30 years and can tell you that it works. Hope this helps.

**Q: What chemical is in this, and is it ok to use without flushing system?**
A: Hi,
Its always recommended a full flush or at least X800 is introduced prior to X100. - Hanicks Heating & Spares 01302 279234.

## Frequently Bought Together

- Sentinel - X100 Inhibitor 1L, Market Leading Heavy Duty Central Heating Inhibitor, Protection Against Corrosion and limescale, ensures Maximum Heating Efficiency and extends System Life, Clear (88000)
- Sentinel - X800 Fast Acting Cleaner 1L, targeted central heating system cleaning inside an hour, restores system efficiency by targeting corrosion debris, ideal for hot and cold systems
- QuickFill - SEL9260: Central Heating Dosing Tool - Add Chemicals Like Fernox Central Heating Inhibitor, Sludge Remover, Leak Sealer & Sentinel X100 to Your Central Heating System

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-10-24*