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Gebo Liquid XL

Gebo Liquid XL

Sealant for heating boilers in case of leakage with a water loss of up to 800 l/day

Article no. 



2 liters


1. Determine the volume of water in the heating system – see below “Water volume in heating systems”.

2. Lock the connecting from the boiler to the radiators and make only a small circle.

3. Filters and strainer must be removed.

4. Shake Gebo Liquid XL well and feed undiluted through the heating filling valve to the heating circuit (1 liter of sealant per 100 liters of water) – see below “Dosing instructions”.

5. Bring the gas boiler system to operating temperature (min. 60 ° C). The sealant must stay for 4-5 hours at min. 60 ° C in the boiler respectively the small circuit. If the operating temperature of 60 ° C falls below, the duration of the sealing process can extend (by several days). It is essential to ensure that the circulation pump is permanently working during the sealing process, because the sealant can only reach the damaged areas by circulation.

6. Open thermostatic valves fully.

7. Open the connecting to the radiators.

8. Thoroughly ventilate circulating pump and radiator.

9. To avoid unwanted crystallization, immediately rinse thoroughly all tools and items that have come into contact with Liquid Sealants with water.

10. After completing the sealing process refit filter and strainer.

11. The sealant can stay in the system.

Water volume in heating system for Gebo Liquid


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