This antifreeze stop leak is one of the best on the market from also one of the most tried and trusted brands in the market. The Bar’s Leaks Block Seal Liquid Copper Intake & Radiator Stop Leak will repair larger leak seals, heater core leaks. Freeze plug leaks, blocks and blown head gaskets in no time at all and for the fraction of the price, it would cost to take it to a professional.
What makes this particular radiator stop leak so special is that it’s a one-step sealer which contains an antifreeze compatible sodium silicate formula so it’s not necessary to drain your cooling system before use. With this product, you are also able to use it with water alone, however then the second bottle of Bar’s Leaks Block Seal Liquid Copper is required to add to the system once the antifreeze is installed. Not only does this product fix leaks but it also stays in your cooling system to prevent further leaks and corrosion occurring in the future.