When it comes to using a stop leak product for a heater core, it's important to note that it is generally considered a temporary solution. The best course of action for a leaking heater core is to have it repaired or replaced by a qualified automotive technician. However, if you need a temporary fix or want to explore a stop leak product, there are a few options available on the market.
Bar's Leaks Liquid Aluminum Stop Leak: This product is designed to seal leaks in various components, including the heater core. It forms a permanent seal and can work effectively for small to moderate leaks.
BlueDevil Pour-N-Go Head Gasket Sealer: While primarily marketed for head gasket leaks, this product can also work for heater core leaks. It seals leaks by forming a chemical bond with the coolant and can provide a temporary fix.
K-Seal Multi-Purpose One Step Permanent Coolant Leak Repair: This product is formulated to seal leaks in the cooling system, including the heater core. It circulates through the system and forms a permanent seal when it comes into contact with air.
It's important to carefully follow the instructions provided by the manufacturer when using any stop leak product. Keep in mind that while these products may provide a temporary fix, they do not address the underlying issue causing the leak. Therefore, it's still recommended to have the heater core professionally repaired or replaced as soon as possible to ensure a reliable and long-term solution.