Defender Leak Sealer is an easy solution to take care of small inaccessible leaks in central heating systems, it will form a soft seal over leaking areas, normally within 24 hours.
Suitable for mixed metal, plastic systems and combi boilers – add with inhibitor.
Stops pressure loss by sealing inaccessible leaks
500ml treats up to 10 radiators at 0.5% system volume
10L dose rate is 1% of system volume