Sentinel X500 Inhibited Antifreeze provides protection against limescale, corrosion, and freezing. It is ideal for properties vulnerable to sub-zero temperatures. It protects all system metals against corrosion using the same unique blend of inhibitors as Sentinel X100 Inhibitor but has the added benefit of protecting system water against freezing when temperatures are low.

• Prevents system water from freezing
• Enhanced limescale and corrosion protection
• Protects all system metals against corrosion
• Ensures optimum boiler efficiency
• Prevents boiler noise
• Prevents pin-holing
• Helps prevent the formation of hydrogen gas