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No, but there are products available just for that purpose, called Block Leak Sealers.
ALUMASEAL® brand has an indefinite shelf life, provided the package has not been opened.
Absolutely not. ALUMASEAL® brand is completely safe for all radiators, heater cores, and cooling system parts.
One tube or bottle of ALUMASEAL® brand will treat up to 20 quarts [5 gallons/ 18.9 L].
You should notice the leak slowing within a few minutes after adding the product, but certainly within 200 miles of driving or less, as it takes a while to thoroughly circulate through the cooling system and stop the leak.
Yes. ALUMASEAL® brand is effective in all extended life coolants. Dex-Cool® is a licensed trademark of General Motors Corp.
This is not necessary. However, it's always a good idea to replace coolant every 2 years unless you use an extended life coolant.
They work equally well at stopping a leak but the liquid also contains conditioners.
No, absolutely not.
You need to use Liquid ALUMASEAL® brand (ASLC16). The radiator caps of many newer vehicles are located in remote locations. For these vehicles, follow the instructions given for radiators, but pour ALUMASEAL® brand into the radiator overflow reservoir.