Top 20 Best Selling Radiator Sealers (2020)




AlumAseal Radiator Stop Leak Liquid is a radiator/cooling system stop leak with a water pump conditioner. Alumaseal Liquid Radiator Stop Leak is compatible with all kinds of antifreeze and coolants. It is also compatible with all metal, plastic and rubber ... more info

AlumAseal is the original powder solution for stopping radiator and cooling system leaks. Simply pour in Alum seal powder and wait for the patented formula to find and seal most cooling system leaks. Alumaseal powder is safe with all types of antifreeze, ... more info


AlumAseal is the original powder solution for stopping radiator and cooling system leaks. Simply pour in Alumaseal powder and wait for the patented formula to find and seal most cooling system leaks. Alumaseal powder is safe with all types of antifreeze, ... more info





Radiator Super Sealer, Container Size 14.5 Oz, Size/Net Weight 14.5 Oz, Clear, Bottle, Clear, Boiling Point 212 F, For Use With Most Common Make Engines, For Autos/Light Duty Trucks Cooling System FluidsFor use as an operational component in fluid-based c ... more info

Gunk Radiator Sealer and Stop Leak is a non-metallic liquid formula that goes to work fast to repair cooling system leaks. It forms a tough, durable seal that holds up to extreme heat, vibration, and pressure. ... more info



Prestone Radiator Sealer Stop Leak features a patented formula that quickly stops leaks in radiators, water pumps and heater cores while also protecting against pitting and corrosion. ... more info




Radiator Stop Leak (powder) seals leak in radiators, heater cores, gaskets and freeze plugs. Lubricates water pump seal and inhibits rust and corrosion. Works with all types and colors of antifreeze coolant, including yours. Treats up to 3 gallons. ... more info


Gunk Super Radiator Sealer has an exclusive free-flowing, non-clogging formula that seals leaks where the other leading brands fail. Compatible with all cooling system metals, hoses, and gaskets. ... more info


Bar's Leaks Radiator Stop Leak Concentrate (liquid) seals leaks in radiators, gaskets, heater cores and freeze plugs. Works with any color antifreeze. Stops minor cooling system leaks and drips caused by normal cooling system wear and age. ... more info





ACDelco 10-108 COOL SEAL5TABS 24CTN ... more info





Hi-Gear products' cooling system additives have set a new standard for quality and performance in the automotive industry. As new technology evolves and is introduced by original equipment manufacturers, the product that maintain and treat equipment need ... more info



Liquid Aluminum Cooling System Radiator and Heater Core Stop Leak safely and instantly seals radiator, heater core, gasket and freeze plug leaks. Contains Xtreme Cool which stops overheating and reduces water temperature. One of the few products to meet A ... more info

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