Cooling system stop leak RS300 quickly stops all leaks including those from radiators, heater
cores, welch plugs and hoses. RS300 can also be added to a leak free cooling system to stops
future leaks and can be safely added to existing coolant. Stop Leak (Part No RS-300) provides a
quick & permanent repair for leaking radiators.
10-minute cooling system cleaner RF300 quickly removes rust, scale, sludge and oil contamination from the whole cooling system. RF300 will stop electrolysis and may be used to stop compatibility issues before changing coolant types.