10 bestEngine Leak Sealerof May 2026
112M consumers helped this year.
1
Bar's Leaks Block Seal Head Gasket Sealant (Pack of 4),1100-4PK
Bar's Leaks
9.8
2
Bar's Leaks OS-1 Seal (Engine Oil Burning/Leak Repair), 16.9 Fluidounces
Bar's Leaks
9.6
3
Lucas Oil 10278 Engine Oil Stop Leak - 1 Quart
Lucas Oil
9.3
16% off
4
Bar's Leaks 1040 Grey Rear Main Seal Repair Concentrate - 16.9 oz.
Bar's Leaks
9.0
5% off
5
Engine Oil Stop Leak Top Off Additive/6x1/Quart
Lucas Oil
8.7
25% off
6
Bar's Leaks 1000 Engine Repair - 16 oz.
Bar's Leaks
8.4
7
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
8.1
8
XADO ATOMEX Stop Leak Engine Oil Additive Sealer (Bottle, 250 ml) - Repair Gaskets & Seals Treatment
XADO
7.8
9
Blue Devil (49499) Engine Oil Stop Leak - 8 Ounce
BlueDevil Products
7.5
10
Bar's Leaks 1010 Grey Engine Oil Stop Leak - 11 oz.
Bar's Leaks
7.2
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