---
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: "KSh16295"
currency: KES
in_stock: true
reviews_count: 8
category: "Sentinel"
url: https://www.desertcart.co.ke/products/48819830-sentinel-x100-inhibitor-1l-market-leading-heavy-duty-central-heating
store_origin: KE
region: Kenya
---

# Maximizes heating efficiency & fuel savings pH-neutral formula for safe system protection 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:** KSh16295
**Availability:** ✅ In Stock

## Summary

> 🛠️ Keep your heating flawless — because your comfort deserves the best!

## 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?** KSh16295 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.ke](https://www.desertcart.co.ke/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

- • **Safe & Balanced:** pH-neutral composition protects without damaging sensitive system components
- • **Efficiency Booster:** Ensures your central heating runs at peak performance, reducing fuel costs
- • **Versatile Application:** Perfect for a wide range of central heating systems, making it the go-to inhibitor
- • **Double Defense Formula:** Combats both corrosion and limescale to extend your heating system’s lifespan
- • **Industry-Trusted Protection:** Recommended by all major boiler manufacturers for unbeatable system care

## Overview

Sentinel X100 Inhibitor 1L is a market-leading, heavy-duty central heating inhibitor designed to protect systems from corrosion and limescale buildup. Its pH-neutral formula ensures safe, long-lasting protection, recommended by all major boiler manufacturers. By maintaining system cleanliness and efficiency, it extends the life of your heating system while minimizing fuel consumption.

## Description

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

Review: Good price for this quality product - The best Inhibitor
Review: Works - I always add sentinel to my Radiators winter time it helps my Heating run well and keep the Radiators clean. I change it every year. So always flush out the Radiators before adding sentinel to your system.if your not sure check before adding.

## 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 | 5,852 in DIY & Tools ( See Top 100 in DIY & Tools ) 66 in Central Heating System Accessories |
| Brand | Sentinel |
| Capacity | 1 litres |
| Colour | Yellow |
| Customer Reviews | 4.6 out of 5 stars 2,116 Reviews |
| Efficiency | A |
| Global Trade Identification Number | 05016402052719 |
| Included Components | Sentinel X100 Inhibitor 1L X100L-12X1L-GB |
| Is Electric | Yes |
| Item Dimensions W x H | 9.7W x 21H centimetres |
| Item Type Name | inhibitor |
| Manufacturer | Sentinel |
| Material | Aluminium |
| Model Number | X100L-12X1L-GB |
| Mount Type | Wall |
| Power source | Corded Electric |
| Product dimensions | 9.7W x 21H centimetres |
| Special Features | Wide range of applications and double corrosion and limescale protection |
| Special feature | 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)

## 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.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good price for this quality product
*by S***N on 8 January 2026*

The best Inhibitor

### ⭐⭐⭐⭐⭐ Works
*by Y***N on 28 September 2025*

I always add sentinel to my Radiators winter time it helps my Heating run well and keep the Radiators clean. I change it every year. So always flush out the Radiators before adding sentinel to your system.if your not sure check before adding.

### ⭐⭐⭐⭐ Heavy-Duty Inhibitor — Excellent Protection, Some Prep Needed
*by F***R on 17 September 2025*

Why I Bought It I picked up Sentinel X100 because my central heating system shows early signs of scale, boiler noise, and mild corrosion. I wanted a treatment that protects metals (including aluminium), prevents limescale and hydrogen gassing, and maintains efficiency without frequent re-treatments. Setup / First Impressions The 1-litre bottle is easy to dose, with clear instructions. The product is pH neutral, non-toxic and biodegradable, which is reassuring. Packaging is practical; the liquid is clear (slightly tinted), and there’s minimal mess in pouring. I also liked that Sentinel offers a test kit to check inhibitor concentration in the system. Performance / Quality After adding X100 into my already flushed, clean system, I noticed quieter operation (less boiler gurgling), better efficiency — radiators heat evenly and stay warmer with less cycling. The TripleTech™ anti-corrosion technology seems to do its job: no visible scale deposits so far and corrosion activity appears minimal. On the downside: its performance depends on good prior cleaning and flushing — if the system is heavily sludged or scaled, X100 alone won’t reverse all issues. Also, you need to dose correctly (about 1% of system water volume) and occasionally check concentration (especially after draining or refilling). Pros ✔️ Protects against scale, corrosion, boiler noise, hydrogen gas — comprehensive protection for metals including aluminium. ✔️ pH neutral, non-toxic, environmentally better than harsher chemicals. ✔️ Helps maintain system efficiency, extend life of boiler/exchanger. ✔️ Once dosed, it needn’t be replaced unless system is drained. Cons ❌ Needs a clean/flushed system beforehand — otherwise it can’t fix existing scale or heavy sludge. ❌ Correct dosage and periodic concentration checks are necessary; small systems may be sensitive to over/underdosing. Final Verdict If you want long-term protection for your central heating system — especially to reduce corrosion, maintain efficiency, and quiet the system — Sentinel X100 is a solid investment. It works very well under the right conditions (clean system, proper dosing). If your system is old, very dirty, or badly scaled, expect that additional cleaning or even professional descaling may be needed first.

## 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 Kenya*
*Store origin: KE*
*Last updated: 2026-03-07*