Top 10 Head Gasket Sealant – Automotive Replacement Head Gasket Sets

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1. Bar's Leaks

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Bar's Leak HG-1 HEAD SEAL Blown Head Gasket Repair

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Bar's Leaks #ad - Fixes leaking freeze and core plugs. Repairs blown head and intake gasket leaks. Seals cracked cylinder heads and blocks. Stops heater core and radiator leaks.
BrandBar's Leaks #ad
ManufacturerBar's Leaks #ad
Height3.22 Inches
Length9.78 Inches
Weight2.5 Pounds
Width3.22 Inches
Part NumberHG-1
ModelHG-1
WarrantyManufacturer Warranty

2. BlueDevil Products

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BlueDevil Head Gasket Sealer 38386

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BlueDevil Products #ad - Safe and easy to use. Good for head gaskets, Warped or Cracked Heads, heater Cores, and Freeze Plugs. Contains no solid or particulate matter that can harm a vehicles engine. Alternative solution for costly and time consuming repairs. Permanent Repair.
BrandBlueDevil Products #ad
ManufacturerBlueDevil Products #ad
Weight2.87 Pounds
Part Number38386
Model38386

3. STEEL SEAL

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6 Cylinder, Steel Seal Blown Head Gasket Fix Repair Sealer

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STEEL SEAL #ad - Backed with a 100% Money-Back Guarantee. Used by thousands of repair shops nationwide. Do-it-yourself Pour in Head Gasket Fix. Used for 6 Cylinder Engines. Permanently seals a crack in the head gasket.
BrandSTEEL SEAL #ad
ManufacturerSteel Seal #ad
Part Number6CYL001

4. KALIMEX LTD

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K-Seal ST3501 Pour and Go Permanent Head Gasket and Block Repair

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KALIMEX LTD #ad - Just pour & go – no need for expensive head Gasket Repairs - The Safe and Easy Way to Fix a Coolant Leak. If product did not seal head gasket leak, the system might be Over-pressurized, which causes back pressure and doesn't allow the product to reach the problem area, on this page below under Technical Specification is a PDF Guide with instructions to follow to complete the repair successfully.

Fixes blown head gaskets, cracked heads and blocks. Scientifically tested - k-seal is the only product to have been successfully tested by the equipment at Brighton University and classes as meeting the demands of ASTM D3147. A permanent repair, guaranteed for the lifetime of the engine.
BrandKALIMEX LTD #ad
ManufacturerSolv-TecA #ad
Height8 Inches
Length2.5 Inches
Weight1 Pounds
Width2.5 Inches
Part NumberKSLST3501
ModelKSLST3501
WarrantyLifetime warranty does not cover abuse

5. BlueDevil Products

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BlueDevil Pour-N-Go Head Gasket Sealer

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BlueDevil Products #ad - Do-it-yourself Formula. Easy to use Pour-n-go. Permanently seals Blown, Cracked or Leaking Head Gaskets. Used for 4 cylinder and v-6 engines.
BrandBlueDevil Products #ad
ManufacturerBlueDevil Products #ad
Height5.5 Inches
Length2.75 Inches
Weight1 Pounds
Width2.75 Inches
Part Number00209
Model00209
Warrantylimited

6. Bar's Leaks

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Bar's Leaks 1100 Head Gasket Repair, 20 oz.

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Bar's Leaks #ad - Dual action 2 part formula — liquid ceramic: liquid penetrates large and small leaks to form a seal actually harder than the original head gasket — REINFORCED FIBERS: Fiber additives lock together with liquid to increase strength and promote a permanent seal. Included components: Unit, Instruction Guide. Seals cracked cylinder heads and blocks. Stops block leaks. Repairs blown head gaskets. Head gasket sealant is not compatible with antifreeze and must only be added to the cooling system after ALL ANTIFREEZE has been flushed and removed.
BrandBar's Leaks #ad
ManufacturerBar's Leaks #ad
Height8.3 Inches
Length1.8 Inches
Weight1 Pounds
Width3.4 Inches
Part Number1100
Model1100
Warranty1 year manufacturer

7. Bar's Leaks

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Bar's Leaks 1111 Block Seal Permanent Head Gasket Fix 24 oz. , Brown

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Bar's Leaks #ad - Stops block leaks. Contains a combination of antifreeze compatible sodium silicate sealing liquid and various size gasket sealing particles which penetrate gaps & cracks and harden to permanently stop leaks. Seals cracked cylinder heads and blocks. Repairs blown head gaskets.
BrandBar's Leaks #ad
ManufacturerBar's Leaks #ad
Height2.5 Inches
Length9.5 Inches
Width2.6 Inches
Part Number1111
Model1111
Warranty1 year manufacturer

8. Permatex

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Permatex 20539 Indian Head Gasket Shellac Compound, 2 oz.

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Permatex #ad - Designed for temperature range -65 F to 350 F. Hard setting, economical sealant. Resists diesel fuels and most auto shop fluids. Formulated to lubricate under the most adverse brake conditions. Seals all common gasketing materials. Flash point: 24. 44.
BrandPermatex #ad
ManufacturerPermatex #ad
Height1.25 Inches
Length1.25 Inches
Weight0.1 Pounds
Width3.69 Inches
Part Number20539
Model20539
WarrantyAs labelled

9. K-Seal

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K-Seal ST5501 Multi Purpose One Step Permanent Coolant Leak Repair

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K-Seal #ad - Permanent coolant leak repair - Just shake, pour and go. If product did not seal head gasket leak, the system might be Over-pressurized, which causes back pressure and doesn't allow the product to reach the problem area, on this page below under Technical Specification is a PDF Guide with instructions to follow to complete the repair successfully. No draining or flushing. Mixes with all antifreeze. Fixes cracks and leaks in radiator, heater core, freeze plugs, cylinder heads, head gasket, water pump casing and engine blocks.
BrandK-Seal #ad
ManufacturerK-Seal #ad
Height6 Inches
Length7.87 Inches
Weight0.6 Pounds
Width2 Inches
Part NumberST5501
ModelST5501
WarrantyWhen K-Seal makes a repair we guarantee it will be permanent

10. K&W

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K&W 401224 FiberLock Head Gasket & Block Repair, 32 Fl Oz

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K&W #ad - Seals larger holes with less fluid loss than competitive products as proven by lab test ASTM D6107. Easy pour and go formula! Permanently fixes head gaskets, cooling systems, engine blocks, and cylinder heads. Works with all antifreeze or plain water. Contains 3 unique technologies. Nanotechnology permanently fixes the smallest cracks and crevices. Military-strength fibers create multi-layer repair over cracks with a web-like weave. Cool-x conditioner – lowers operating temperature as it circulates through cooling system. ".
BrandK&W #ad
ManufacturerCRC #ad
Height9.54 Inches
Length3.4 Inches
Width3.4 Inches
Part Number401224-6
Model401224-6
Warranty2 year manufacturer