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10 bestCar Head Gasket Sealerof December 2025

112M consumers helped this year.

1

K-Seal Coolant Leak, 236ml | Multi-use Car Radiator & Head Gasket Repair Sealant
K-Seal Coolant Leak, 236ml | Multi-use Car Radiator & Head Gasket Repair Sealant

K-Seal

9.8

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2

K-Seal HD Coolant Leak Repair, 472ml | HGV Radiator, Block & Head Gasket Sealant
K-Seal HD Coolant Leak Repair, 472ml | HGV Radiator, Block & Head Gasket Sealant

K-Seal

9.6

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3

Wynn's Black Instant Gasket Maker Silicone High Temperature RTV Sealant 200ml
Wynn's Black Instant Gasket Maker Silicone High Temperature RTV Sealant 200ml

Wynn's

9.4

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4

Realth Silicone Gasket Maker | 1 Pack 3.53 Oz(100g) | Ultra Black RTV | High Temperature | Oil Resistance | High Strength Flange Sealing for Automotive Machine Equipment Repairing(SG119)
Realth Silicone Gasket Maker | 1 Pack 3.53 Oz(100g) | Ultra Black RTV | High Temperature | Oil Resistance | High Strength Flange Sealing for Automotive Machine Equipment Repairing(SG119)

Realth

9.1

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10% off

5

Wynn's Engine Oil Stop Leak Sealer Treatment Additive For All Engine Types 325ml
Wynn's Engine Oil Stop Leak Sealer Treatment Additive For All Engine Types 325ml

Wynn's

8.9

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Related productsUp to 12% off

HOLTS Wondarweld - 500ml - WW500

HOLTS Wondarweld - 500ml - WW500

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Plextone Black RTV Silicone Engine Repair Gasket Seal Maker, Sealant Glue, High Temperature Heat Resistant from -80ºF to 600ºF

Plextone Black RTV Silicone Engine Repair Gasket Seal Maker, Sealant Glue, High Temperature Heat Resistant from -80ºF to 600ºF

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Holts Sealit Leak Repair 250ml, (Packing May Vary)

Holts Sealit Leak Repair 250ml, (Packing May Vary)

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K-Seal Permanent Coolant Leak Repair for Cooling Systems Head Gaskets Radiators

K-Seal Permanent Coolant Leak Repair for Cooling Systems Head Gaskets Radiators

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6

Rislone HEAVY DUTY BLOWN HEAD GASKET REPAIR
Rislone HEAVY DUTY BLOWN HEAD GASKET REPAIR

Rislone

8.6

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7

BLUE DEVIL POUR AND GO HEAD GASKET SEALANT
BLUE DEVIL POUR AND GO HEAD GASKET SEALANT

BlueDevil Products

8.3

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8

BLUE DEVIL HEAD GASKET SEALANT
BLUE DEVIL HEAD GASKET SEALANT

BlueDevil Products

8.1

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9

Visbella Neutral RTV 100% Gasket Maker Oil and Water Resistance Anti-Freeze Remain Flexible Ultra 3 oz. High Temperature 600°F Sealant Tube
Visbella Neutral RTV 100% Gasket Maker Oil and Water Resistance Anti-Freeze Remain Flexible Ultra 3 oz. High Temperature 600°F Sealant Tube

Visbella

7.8

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10

FOR Gasket Maker Sealant Engine Covers LOCTITE Black Silicone 70ML
FOR Gasket Maker Sealant Engine Covers LOCTITE Black Silicone 70ML

Generic

7.5

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