Welcome to CosWarm. Optimising Heating Efficiency

CosWarm is the manufacturer of the trademarked brand CosWarm.

Specialising in chemicals for heating systems.

Our Products - CW1

EXTEND THE LIFE OF YOUR BOILERS with CosWarm CW1 Boiler Corrosion Inhibitor. This revolutionary formula protects your system from scale formation, corrosion buildup and provides continuous protection. It stops frequent venting of radiators and ensures long-lasting and smooth working of boilers.
SUITABLE FOR EXISTING & NEW HEATER SYSTEMS: CosWarm CW1 steam boiler inhibitor for central heating can be used for all types of boiler, radiators and pipework systems. Boiler limescale and rust preventer is compatible with all metals and materials (including aluminium) commonly used in central heating systems.
NON-TOXIC & BIODEGRADABLE: With CosWarm CW1 central heating inhibitors, power meets green. The biodegradable formula is safe for your boilers as well as the Earth. Boiler rust and corrosion inhibitor is non-toxic and is safer to use around pipes, people and the environment than other toxic and acidic boiler inhibitors.
SUPER CONCENTRATED FORMULA: Our highly concentrated formula treats much more and requires no secondary containment for it to work. 500 ml of CosWarm CW1 heating system inhibitor can treat up to 18 single radiators (150-litre system).
NSF CERTIFIED FOR SAFETY: Millions of customers take it as a mark of quality assurance because every aspect of a product’s development is thoroughly evaluated by one of today’s most respected independent product testing organisations.

Our Products - CW2

SHHHH…DOSE YOUR BOILERS with CosWarm CW2 Boiler Silencer. It isn’t very pleasant to be around noisy boilers, but our boiler liquid can effectively solve this problem and restore the heating efficiency of your boilers and radiators.
GIVE YOUR BOILER SOME TLC: It is crucial that you don’t take a noisy boiler for granted and immediately remedy it with our boiler noise reducer. Our leave-in treatment is a gentle yet highly effective solution that eliminates boiler noise and keeps your boiler bubbling and healthy always.
SUPER CONCENTRATED & FAST-ACTING FORMULA: Our boiler and central heating system noise silencer can treat up to 18 individual radiators, i.e., a 150-litre system. This ensures that this bottle will go a long way in curing the boilers.
WIDE COMPATIBILITY: Our boiler noise silencer can be used with most domestic boilers, radiators, pipes and heating systems. It is also compatible to use around metals most commonly found in the heating systems, including aluminium.
SAFE FOR YOU, THE BOILERS & THE ENVIRONMENT: Our non-toxic and non-acidic radiator silencer is a safer alternative and can be used worry-free around people, the environment and in your heating systems. As this central heating silencer liquid is biodegradable, it won’t harm Mother Nature either.

Our Products - CW3

EFFECTIVE CLEANSING OF CENTRAL HEATING SYSTEM: Regular cleaning of heating systems can prevent it from damage. Use CosWarm CW3 boiler cleaner to effectively remove scale, sludge and debris and retain the heating efficiency of your heating systems.
SUITABLE FOR EXISTING & NEW HEATING SYSTEMS: CosWarm CW3 central heating system cleaner can be used for all types of boiler, radiators and pipework systems. Radiator cleaner is compatible with all metals and materials commonly used in central heating systems.
NON-TOXIC & NON ACIDIC: Our non-toxic and non-acidic boiler and radiator descaler is a safer alternative compared to other toxic, chemical formulas. It is safe to use around people, the environment and your heating systems.
SUPER CONCENTRATED FORMULA: Our highly concentrated formula requires no secondary containment for it to work. 500 ml of CosWarm CW3 central heating system cleaner can treat up to 18 single radiators (150-litre system).
EASY TO USE: Our central heating cleaner makes boiler cleaning a breeze. The system can be left running normally while you are using our boiler cleaner. And it’s easy to use; just pour the chemical in the system according to instructions and let it work. Treat with CW1 inhibitor after use.

Our Products - CW4

STOPS SMALL LEAKS & FIXES PRESSURE LOSS: CW4 Leak Sealer seals all the small and inaccessible leaks, thus saving time and money in draining down and repairing cost. Our boiler leak sealant also helps in fixing pressure loss due to minor leaks from central heating systems.
SUPER CONCENTRATED FORMULA: Our boiler and central heating system leak stopper can treat up to 18 single radiators, i.e., a 150-litre system. It is easy to use, just pour it in the system according to the instructions and let it work.
HARMLESS FOR METALS: There are many leak sealant chemicals that are not friendly when they come into contact with metals. CW4 Leak Sealer liquid is suitable for use with all the metals and materials, including steel, ferrous metals, copper and aluminium.
CONVENIENCE AT ITS BEST: Our leak sealer and stopper makes minor repairs in the boiler a breeze. It does not interfere with the working of your central heating systems and you won’t have to shut down the systems before or while using it. The product can be left in the system permanently.
SAFE FOR YOU, THE BOILERS & THE ENVIRONMENT: Our non-toxic radiator leak sealer is a safer alternative compared to other toxic, chemical formulas. As it is biodegradable, it won’t harm Mother Nature either. Safe to use around people, the environment and your heating systems.