Stops Radiator & Heater Core Leaks
Safely & Effectively.
AlumAseal
Q: Will AlumAseal fix a head gasket leak or a leak in a cracked engine block?
A: No, but there are products available just for that purpose, called Block Leak Sealers.
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Q: I have some old AlumAseal in my garage. How long will it last?
A: AlumAseal has an indefinite shelf life, provided the package has not been opened.
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Q: If I use AlumAseal will it plug up my radiator, heater core or other parts of the cooling system?
A: Absolutely not. Alumaseal is completely safe for all radiators, heater cores, and cooling system parts.
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Q: I have a truck with a large cooling system. How big a system will a tube or bottle of AlumAseal treat?
A: One tube or bottle of AlumAseal will treat up to 20 quarts [5 gallons/ 18.9 L].
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Q: How long should AlumAseal take to work?
A: 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.
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Q: Will AlumAseal stop leaks in a cooling system using extended life antifreeze like Dex-Cool®?
A: Yes. AlumAseal is effective in all extended life coolants. Dex-Cool® is a licensed trademark of General Motors Corp.
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Q: Should I drain my cooling system and use fresh coolant before using AlumAseal?
A: This is not necessary. However, it's always a good idea to replace coolant every 2 years unless you use an extended life coolant.
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Q: Which product works best, the liquid or powder?
A: They work equally well at stopping a leak but the liquid also contains conditioners.
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Q: Is AlumAseal harmful to brass, rubber, plastic, steel or aluminum cooling system parts?
A: No, absolutely not.
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Q: Will AlumAseal stop a leak in a cooling system rubber hose?
A: No.
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Q: I can't reach my radiator cap. What should I do?
A: You need to use Liquid AlumAseal (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 into the radiator overflow reservoir.
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