10 bestRadiator Stop Leaksof September 2025
112M consumers helped this year.
5% off
1
K-Seal ST5516 HD Multi Purpose One Step Permanent Coolant Leak Repair
K-Seal
9.9
2
K-Seal ST5501 Multi Purpose One Step Permanent Coolant Leak Repair
K-Seal
9.8
3
K-SEAL Coolant Leak Repair, ST9501 472ml Multi-Purpose Formula Stops Leaks in the Radiator, Head Gasket, Block, Water Pump Casing, Heater Core, Freeze Plug - Pour and Go - Designed for Canadian Market
K-Seal
9.7
4
Bar's Leaks HDC Radiator Stop Leak Tablet - 60 Grams
Bar's Leaks
9.4
5
Liqui Moly Radiator Stop Leak | 250 ml | Cooler additive | SKU: 20132
Liqui Moly
9.2
6
J-B Weld 2120 Radiator and Plastic Repair Kit
JB Weld
8.9
22% off
7
Bar's Leaks 1196 Grey Radiator Stop Leak - 11 oz.
Bar's Leaks
8.6
8
Bar's Leaks 1194 Grey Radiator Stop Leak - 6 oz.
Bar's Leaks
8.3
11% off
9
Bar's Leaks PLT11 Pelletized Radiator Stop Leak - 11 oz.
Bar's Leaks
8.0
5% off
10
Bar's Leaks 1109 Block Seal Liquid Copper Intake and Radiator Stop Leak - 18 oz.
Bar's Leaks
7.8
Related Reviews You Might Like
Best Reviews Guide Newsletter
Get exclusive articles, recommendations, shopping tips, and sales alerts
Sign up for our newsletter to receive weekly recommendations about seasonal and trendy products
Thank you for subscribing!
By submitting your email address you agree to our Terms and Conditions and Privacy Policy