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Central Heating Restoratives & Leak Sealers
Professional chemical solutions for restoring central heating system performance, reducing sludge and deposits, tackling boiler noise and sealing inaccessible leaks.
Calmag’s range of heating system restoratives and leak sealers provides installers with targeted solutions for common central heating problems.
CalSilencer
Boiler noise silencer
CalSilencer is a flocculent blend that is typically
used to shift deposits of silt, mud and sand from
open drains. CalSilencer gives the silt particles a
buoyancy in water and by putting a small electrical
charge on each particle it causes them to repel
each other.
Material treated with CalSilencer is unlikely to form a sold mass again. This enables the silt and the sludge content of heating systems to be removed
quickly and effectively.
- Available 1 litre or 500ml bottles
- 1L treats 10-15 radiators/ a 100 litre system
(equivalent of a standard 4 bedhouse) - Overdosing does not present a problem
- Suitable to use with all components
- Will not harm aluminium or other materials
- Requires no neutralisation
- Can remove light rust
- For new and old systems
- Restores boiler efficiency
- Can be left in the system for up to 2 weeks
CalSealer
Seals Leaks
This Leak Sealer
seals inaccessible leaks and weeping joints within 1-24 hours. It does not block pumps, valves or air-vents and reduces pressure loss in sealed systems by forming a soft seal within a short time period. The CalSealer remains in the system and there is no need to flush and will treat up to 10 radiators (or 100 litres).
- Non-acidic
- Water soluble
- Safe to use with stainless steel heat exchangers
- Will not break down seals
- Does not create leaks
- Avoids costly repairs
This is only suitable for fully indirect systems and is not suitable for use with PRIMATIC single feed cylinders.
Available as 1 litre or 500ml bottles
When Should You Use a Central Heating Restorative?
Boiler noise
Where boiler noise is associated with sludge, deposits or restricted circulation, a suitable restorative treatment may help address the underlying contamination.
Sludge and magnetite
Restorative chemicals can help loosen and remove certain deposits circulating within heating systems.
Pressure loss
Where an inaccessible weeping joint or leak is causing pressure loss, a suitable leak-sealing chemical may provide an alternative to accessing difficult-to-reach components.
Existing heating systems
Restoratives are particularly relevant when diagnosing and treating problems in existing systems where contamination or minor inaccessible leaks have been identified.
Central Heating Restorative vs Cleanser
Central heating cleansers and restoratives perform different roles.
A central heating cleanser is primarily used to clean a system and remove contamination such as sludge, flux and installation debris.
A restorative is used to address a specific existing system problem, such as stubborn deposits, boiler noise or inaccessible leaks.
The appropriate treatment depends on the condition of the system and the problem identified.
Central Heating Inhibitor FAQs
What is a central heating restorative?
A central heating restorative is a chemical treatment designed to address specific problems within an existing heating system, such as sludge, deposits, boiler noise or inaccessible leaks.
What is a central heating leak sealer?
A central heating leak sealer is a chemical treatment designed to seal certain inaccessible leaks or weeping joints within a heating system.
Can a central heating leak sealer stop a boiler leak?
A leak sealer may help address suitable inaccessible leaks or weeping joints within the heating system. It should not be considered a substitute for repairing accessible or significant leaks.
Can restorative chemicals reduce boiler noise?
Calmag restorative products are specifically designed to help reduce boiler noise associated with deposits and contamination within heating systems.
Should I use an inhibitor after using a restorative?
Where appropriate, once the heating system has been treated and returned to the correct condition, an appropriate inhibitor can provide ongoing protection against corrosion and further deposits.
Chat to a Calmag Expert
Just pop your details in below and one of the team will get back to you. Or, give us a call on 01986 784759
Here's some extra Central Heating Solutions:
CLEAN
Power Flushing & System Cleaning
Over time, central heating systems can accumulate sludge, scale, corrosion, flux, oil, grease and other debris. This contamination can restrict circulation, reduce heating performance and contribute to boiler and radiator problems.
Calmag power flushing products are designed to help heating professionals effectively clean contaminated central heating systems and restore circulation.
Discover:
- CalFlush Power Flushing Unit
- Powerflush Chemical
- Central heating system cleaning
PROTECT
Central Heating Chemicals & Treatment
Cleaning a heating system is only part of the solution. Once a system has been cleaned, it needs ongoing protection against corrosion, scale and further contamination.
Calmag central heating chemicals and treatment packs are designed to help maintain water quality and protect heating systems, boilers, radiators and pipework.
Discover:
- Central heating inhibitors
- System cleaners
- Heating treatment packs
- System protection chemicals
FILTER
Central Heating Chemicals & Treatment
Even with chemical protection, heating systems can generate and collect debris. A suitable central heating filter provides an additional layer of protection by capturing unwanted contaminants before they can circulate around the system.
Calmag central heating filters are designed to help protect boilers and heating components by removing debris from the system.
Discover:
- Central heating filters
- Magnetic filtration
- Boiler protection
- System filtration
For all your Sales & Technical enquiries and for your nearest merchant
please call direct on 01535 210320
water filtering products for domestic use too.
Available from merchants via your local installer.






