What brand of radiator sealant works best?
You are driving on borrowed time. A standard OEM radiators life is 12 – 14 yrs. at best with perfect maintenance. It has only one row of cooling tubes with crimped on O-ringed plastic expansion tanks on each side. If you dump in any radiator sealer you risk sealing off the heater core or plugging up a cooling passage in your block or cylinder head. You can buy a new one for $125.00 or less and not risk a plugged heater core or an over heated engine because all of this stuff will seal a radiator cooling tube-s particularly if they have ten years worth of corrosion and rust build up.
