This product is ideal for sealing small leaks or weeping joints on all types of indirect central heating systems. It is an easy-to-administer solution to the problem of weeping joints or pinhole leaks and it is compatible with other Calmag HV products. Calmag HV Leak Sealer will not cause blockages within the system and can be used with inhibtor in the system. KEY FEATURES Seals all minor leaks Easy to apply Will not cause blockages within the system Compatible with other Calmag HV products and other approved treatment products Readily dispersible Suitable for all metals including aluminium Non-toxic and non-irritant 1 Litre treats upto 10 rads A soft Seal will form after 1 - 24 hours from entering the system