Leak sealer can eliminate damp patches under screed avoiding costly repairs|Add Leak Sealer to the central heating circuit|Leak Sealer is effective within 1 24 hours when a soft seal will form|One 0.5 litre bottle is usually sufficient to seal a typical domestic central heating system comprising 10 radiators|Compatible with all Eco central heating products|Corrosion protection must also be carried out by adding inhibitor|Instructions: Shake bottle before opening and use entire contents. Suitable for use with Power Flushing machines, dose via the reservoir. For open vented systems, dose via the Feed/Expansion tank. Switch on system and bleed radiator as necessary. After completion of treatment, peel installation label from side panel and attach to boiler casing. Record date for future reference.