Johnsens S19011A Super Radiator Stop Leak Coolant Leak Sealer

The Johnsens S19011A Super Radiator Stop Leak is a concentrated liquid formula designed to stop minor leaks in radiators, heater cores, gaskets, and freeze plugs. Compatible with all types of antifreeze and coolant, this sealer works within the existing cooling system without requiring a full flush or system drain.

Key Features:

• Stops minor leaks in radiators, heater cores, and hoses
• Compatible with all antifreeze and coolant types, including OAT and HOAT formulas
• Concentrated formula — one bottle treats a standard cooling system
• Helps seal small cracks and pinholes quickly and effectively
• Safe for use on aluminum, steel, copper, and brass cooling system components
• Will not clog or damage the cooling system when used as directed

Johnsens S19011A is a reliable, fast-acting solution for addressing coolant leaks without the cost and time of a full repair. Simply add to the radiator or coolant reservoir as directed for a quick, effective seal.