SPECIAL OFFERS
Adey Leak Sealer Liquid MC4 500ml
Adey MC4 leak sealer liquid, supplied in a 500 ml bottle for use on central heating systems.
£15.83
£13.19 ex. VAT · VAT at 20%
Same-day dispatch
Ordered by 4pm Mon–Fri, 10:30am Sat.
30-day returns
Unused, in original packaging.
What it is
Adey MC4 is a liquid leak sealer supplied in a 500 ml bottle. It is added to a central heating system to seal minor leaks and weeps within the circuit. It is intended for use where small losses of water are causing repeated pressure loss.
Signs this part needs replacing
- System pressure drops repeatedly and needs frequent topping up
- Small weeps or drips appear at joints, valves or radiator connections
- Air keeps collecting at radiators despite regular venting
- Water staining or damp patches appear near pipework or fittings
Before you order
- Confirm a 500 ml bottle is the size required for the system
- Check the appliance or system manufacturer's guidance on the use of leak sealer
- Confirm the leak is minor — a failed component or an open joint needs repair, not sealing
- Check the dosage guidance on the label against the system volume
No specification data held for this part.
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| SPECIAL OFFERS Adey | — | — | — |
Documents & drawings
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No documents held for this part. The technical team will source them from the manufacturer — usually the same working day.
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