How long does Calmag H&V Controls HV100 last in the system?
Once the correct amount of HV100 has been added, it remains in the system indefinitely, providing ongoing protection. Depletion only occurs by dilution, e.g. when the system is topped up after removing, emptying and then re-connecting radiators during house decorating.

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.
Dose System at 1% – Aprrox 1 Litre Per 10 Rads (100 Litres)

Is there a Safety Data Sheet or a COSHH Data Sheet?
HV100 is non hazardous and zero COSHH rated. Both the Safety Data Sheet and the COSHH Data Sheet are available upon request.