Sentinel Central heating Cleaner 1L.This central heating cleaner disperses sludge and other deposits to maintain system efficiency and is suitable for all types of indirect central heating systems.

Sentinel Leak sealer 1L.This leak sealer seals inaccessible leaks and weeping joints internally.

Sentinel Noise reducer 1L.This noise reducer decreases the amount of noise a boiler makes and is suitable for all types of indirect central heating systems.