LA-CO SF4 leak sealer is an internal use leak sealer for sealing inaccessible leaks and weeping joints within the central heating system. By forming a soft seal within 24 hours of entering the primary circuit without blocking the pumps, valves or vents it prevents potential water damage, improves central heating system efficiency and saves fuel.
- 1 litre bottle
- Reduces pressure loss from a sealed system
- Will treat up to 10 radiators
- Non-toxic formulation