Rapid cleaner for systems older than six months and powerflushing

A heavy-duty, multi-purpose cleaner, Sentinel X800 Fast Acting Cleaner quickly removes corrosion deposits and scale from older systems. Developed especially for use with powerflushing machines to provide a more rapid and effective clean, it restores circulation to old, dirty heating systems and prepares new systems for the addition of Sentinel X100 Inhibitor.

Key features

  • Powerful removal of all major foulants and debris
  • Cleans rapidly even in cold systems
  • Ideal with or without powerflushing
  • Exceptional result when powerflushing
  • Harmless to the environment, completely non-toxic and biodegradable
  • Suitable for use with all commonly encountered metals and alloys

Available sizes

1L liquid X800L-12X1L-GB

Sentinel X800 Fast Acting Cleaner restores a more even heat distribution to old systems, keeping the house warmer and bills lower.

Sentinel X800 Fast Acting Cleaner uses TripleTech™ Power Clean Technology, a unique formula with 3 different chemical technologies, to penetrate, attack and dissolve corrosion debris and limescale into a 'ready to flush' solution. In addition to its cleaning properties, X800 Fast Acting Cleaner also provides temporary anti-corrosion protection, preparing systems for the addition of Sentinel X100 Inhibitor.

The unique composition of X800 Fast Acting Cleaner allows it to work under neutral pH conditions, eliminating the concerns associated with conventional acid cleaners.

1 litre of Sentinel X800 Fast Acting Cleaner is sufficient to clean a typical system of up to 10 radiators. For larger systems, 2 litres should be used. Where systems are badly fouled, a higher concentration is recommended, i.e. 2 litres for a typical system. This product will not clear a completely blocked pipe. 

To clean an older system in accordance with BS 7593it is recommended that this product is used with powerflushing equipment. In this scenario, administer Sentinel X800 JetFlo Ultimate Cleaner via the powerflushing equipment, following equipment manufacturer's instructions. Alternatively, circulate the product (preferably at normal operating temperature, with all valves open and the pump turned to maximum flow) for a minimum period of 1 hour or until satisfactory performance is restored.

Powerflushing: Follow the instructions supplied with the powerflushing machine.

Open Systems: Dose via F&E cistern, via a by-pass feeder or use a Sentinel Dosing Vessel.

Sealed Systems: If the system is empty, add to any convenient point before filling. If full, use
a Sentinel Dosing Vessel to inject via the filling loop or other access point.

The information provided below enables compliance with the Control of Substances Hazardous to Health Regulations. 

 Sentinel X800 Fast Acting Cleaner
AboutAn aqueous emulsion of dispersants, wetting agents and corrosion inhibitors. 


Beige/Tan dispersion



Specific Gravity

1.15 (20°C)

pH (concentrate)

6.5 (approx.)

Freezing Point

Health Hazards
  • Not for use in potable water systems
  • Not considered hazardous to health
First Aid

Skin Exposure
Remove all contaminated clothing. Wash exposed area immediately with water.

Eye Exposure
Flush immediately with plenty of running water for 15 minutes. Seek medical attention.

Do not feed anything by mouth to an unconscious or convulsive victim. Do NOT induce vomiting. Immediately seek medical advice. If victim is fully 
conscious, dilute contents of stomach using 3-4 glasses of water.

Remove victim from contaminated area to fresh air.


  • Normal chemical handling.
  • Avoid contact with skin and eyes.
  • Wear suitable protective clothing, gloves and eye/face protection. 
  • Keep out of reach of children and animals. 
  • Wash out empty container thoroughly with water before disposal.
  • Avoid freezing
  • Keep container tightly closed
  • Store in cool, well ventilated area.
SpillageAbsorb on to inert material and dispose of according to Special Waste Regulations.
Fire/Explosion RisksNon-flammable