10 bestEngine Leak Sealerof September 2026
112M consumers helped this year.
13% off
1
Lucas Oil 10278-12PK Engine Oil Stop Leak - 1 Quart, (Case of 12)
Lucas Oil
9.7
2
Permatex 82099 Spray Sealant, 9 oz.
Permatex
9.4
5% off
3
Permatex 59803 Ultra Black Gasket Maker 598BR, 80mL
Permatex
9.1
11% off
4
Engine Oil Stop Leak/4x1/Gallon
Lucas Oil
8.8
5
Bar's Leaks OS-1 Seal (Engine Oil Burning/Leak Repair), 16.9 Fluidounces
Bar's Leaks
8.5
6
STP High Mileage Oil Treatment + Stop Leak Engine Oil Additive, 15 fl oz, Contains ZDDP Anti-Wear Agent to Fight Friction, Rejuvenates Seals and Gaskets, Stops Leaks
STP
8.2
13% off
7
Bar's Leaks 1040 Grey Rear Main Seal Repair Concentrate - 16.9 oz.
Bar's Leaks
7.9
8
BlueDevil Rear Main Sealer - 8 Ounce (00234)
BlueDevil Products
7.6
9
ATP Automotive AT-205 Re-Seal Stops Leaks, 8 Ounce Bottle (2 Pack)
ATP Automotive
7.4
10% off
10
Bar's Leaks 1010 Grey Engine Oil Stop Leak - 11 oz.
Bar's Leaks
7.1
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