Best Head Gasket Sealer: image
Top Pick

Gasket sealer and belt dressing from Gasgacinch, which is formulated to prevent leaks, reduces the cost of repairs, and creates a superior grip on metal surfaces. The sealant has been tested in various temperatures and can be used in hot, cold, wet, acidic, basic, and abrasive environments. Notably, it was approved by the National Institute of Standards (NIST) in 2015. It also provides anti-corrosive properties. The sealant’s use is restricted to automotive.

Value for Money

BlueDevil Head Gasket Sealer is a permanent solution for head gasket leaks, warped or cracked heads, and freeze plugs. The sealer contains no solid or particulate matter and will not clog your engine. It can be used in petrol and diesel engines as well as in electric vehicles. Not only does it prevent leaks but also helps to maintain the condition of the engine. BlueDevil has been approved by the National Institute of Standards (NIST) for use in diesel engines.

Honorable Mention

Blown Cylinder Head And Intake Gasket Leaks. The leaks were discovered after a vehicle was driven into a parking lot and the gasket leaked, leading to a fire. The car’s owner has been asked to replace the damaged part with a new one. However, no action has been taken so far. The company is looking for a replacement. Notably, it had earlier claimed that the leak was caused by improper use of fuel.

Best Head Gasket Sealer

Top 10 Best Head Gasket Sealer

1

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

2,678 ratings | 2 offers | 2,678 Reviews
Price: $28.58$31.55
Why we chose it
  • Seals Cracked Cylinder Heads And Blocks
  • Stops Heater Core And Radiator Leaks
  • Fixes Leaking Freeze And Core Plugs
  • Repairs Blown Head And Intake Gasket Leaks
Bar's Leak HG-1 HEAD SEAL Blown Head Gasket Repair: image
82%
customers recommend this product
4.1/ 5
Easy to use4.3
Value for money3.7
Mileage3.5
2

BlueDevil Head Gasket Sealer (38386)

1,694 ratings | 11 offers | 1,694 Reviews
Price: $49.95$73.93
Why we chose it
  • Good for Head Gaskets, Warped or Cracked Heads, Heater Cores, and Freeze Plugs
  • Alternative solution for costly and time consuming repairs
  • Contains no solid or particulate matter that can harm a vehicles engine
  • Permanent Repair
  • Safe and easy to use
BlueDevil Head Gasket Sealer (38386): image
82%
customers recommend this product
4.1/ 5
Easy to use3.9
Value for money3.5
Mileage3.5
3

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

707 ratings | 6 offers | 707 Reviews
Price: $20.86$43.04
Why we chose it
  • 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
  • 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
  • Just Pour & Go No Need for Expensive Head Gasket Repairs – The Safe and Easy Way to Fix a Coolant Leak
  • Fixes blown head gaskets, cracked heads and blocks
  • A permanent repair, guaranteed for the lifetime of the engine
K-Seal ST3501 Pour and Go Permanent Head Gasket and Block Repair: image
80%
customers recommend this product
4/ 5
Easy to use4.5
Mileage3.8
Value for money3.7
4

BlueDevil Pour-N-Go Head Gasket Sealer

848 ratings | 9 offers | 848 Reviews
Price: $29.97$40.91
Why we chose it
  • Easy to Use Pour-n-go
  • Do-It-Yourself Formula
  • Used for 4 cylinder and v-6 engines
  • Permanently Seals Blown, Cracked or Leaking Head Gaskets
BlueDevil Pour-N-Go Head Gasket Sealer: image
82%
customers recommend this product
4.1/ 5
Easy to use4
Value for money3.5
Mileage3.1
5

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

677 ratings | 1 offers | 677 Reviews
Price starts from: $26.47
Why we chose it
  • “Contains 3 unique technologies. Military-Strength Fibers create multi-layer repair over cracks with a web-like weave. Nanotechnology permanently fixes the smallest cracks and crevices. Cool-X Conditioner lowers operating temperature as it circulates through cooling system.”
  • 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, engine blocks, cooling systems, and cylinder heads.
  • Works with all antifreeze or plain water.
K&W 401224 FiberLock Head Gasket & Block Repair - 32 Fl Oz: image
80%
customers recommend this product
4/ 5
Easy to use3.9
Value for money3.7
Mileage3.6
6

Bar’s Leaks Block Seal Head Gasket Fix

1,133 ratings | 30 offers | 1,133 Reviews
Price: $23.21$49.46
Why we chose it
  • Seals cracked cylinder heads and blocks
  • 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.
  • Stops block leaks
  • Repairs blown head gaskets
Bar's Leaks Block Seal Head Gasket Fix: image
84%
customers recommend this product
4.2/ 5
Value for money4
Mileage3.7
Top Pick
7

Gasgacinch 440-B Gasket Sealer and Belt Dressing, 8 oz

550 ratings | 15 offers | 550 Reviews
Price: $13.24$28.95
Why we chose it
  • Preferred in nearly all mechanical industries including: auto repair, diesel and truck repair, high-performance engine builders, motorcycle repair and many more
  • Gasgacinch Gasket Sealer and Belt Dressing provides unmatched gasket sealing properties, preventing leaks, reducing expensive repairs, and creates a superior grip as a belt dressing
  • Flash point: -7.0 degrees celsius
  • Gasgacinch Gasket Sealer remains flexible and makes it easier to assemble and disassemble an engine or transmission, often any residue may be removed simply by rubbing it away
  • When cured, Gasgacinch is flexible, has high-peel strength, high-shear strength, fatigue resistant, vibration dampening, high heat resistance, gasoline resistant, and oil resistant
  • Adheres to carbon steel, alloy steel, aluminum, titanium, lead, magnesium, synthetic and natural rubber, copper and cork, and may be used in hot, cold, wet, dry, acid, basic, and abrasive environments
  • Fit type: Vehicle Specific
Gasgacinch 440-B Gasket Sealer and Belt Dressing, 8 oz: image
96%
customers recommend this product
4.8/ 5
Adhesion4.7
Easy to remove4.3
8

STEEL SEAL SSAMZ Head Gasket Repair

176 ratings | 1 offers | 176 Reviews
Price starts from: $1
Why we chose it
  • Steel Seal will work on all vehicles: cars, bikes, vans, pickups, 4x4s, tractors, lorries and boats.
  • All Types of Head Gasket Failure
  • Now compatible with all types of antifreeze and any vehicle with a water cooled system
  • Blown Head Gaskets
  • Warped Cylinder Head
STEEL SEAL SSAMZ Head Gasket Repair: image
72%
customers recommend this product
3.6/ 5
Easy to use3.9
Mileage3.5
Value for money3.5
9

Bar’s Leaks 1100 Head Gasket Repair – 20 oz.

362 ratings | 16 offers | 362 Reviews
Price: $7.35$26.47
Why we chose it
  • Included components: Unit, Instruction Guide
  • Seals cracked cylinder heads and blocks
  • 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.
  • 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
  • Stops block leaks
Bar's Leaks 1100 Head Gasket Repair - 20 oz.: image
82%
customers recommend this product
4.1/ 5
Value for money4.3
Mileage4.3
Easy to use4
10

Permatex 20539 Indian Head Gasket Shellac Compound, 2 oz.

511 ratings | 15 offers | 511 Reviews
Price: $3.95$12.87
Why we chose it
  • Resists diesel fuels and most auto shop fluids
  • Seals all common gasketing materials
  • Hard setting, economical sealant
  • Flash Point: 24.44
  • Formulated to lubricate under the most adverse brake conditions
  • Designed for temperature range -65 F to 350 F
Permatex 20539 Indian Head Gasket Shellac Compound, 2 oz.: image
94%
customers recommend this product
4.7/ 5
Value for money4.3
Easy to use4.2
Top Pick
Gasgacinch 440-B Gasket Sealer and Belt Dressing, 8 oz
Gasgacinch Gasket Sealer and Belt Dressing provides unmatched gasket sealing properties, preventing leaks, reducing expensive repairs, and creates a superior grip as a belt dressing. Gasgacinch Gasket Sealer remains flexible and makes it easier to assemble and disassemble the engine or transmission. Often any residue of Gasgacinch may be removed simply by rubbing it away. Many other sealers require solvents or destructive scraping to clean off a head or flange. Gasgacinch adheres to carbon steel, alloy steel, aluminum, titanium, lead, magnesium, synthetic and natural rubber, copper and cork. Gasgacinch Gasket Sealer may be used in hot, cold, wet, dry, acid, basic, and abrasive environments. Gasgacinch, when cured, is flexible, has high-peel strength, high-shear strength, fatigue resistant, vibration dampening, high heat resistance, gasoline resistant, and oil resistant. Gasgacinch performs exceptional compared to other sealants that are pasty and thick. Competitor's thick material makes it difficult to seep into the small imperfections of the metal surfaces, creating air pockets where leaks will develop. In contrast, Gasgacinch is very fluid, which allows it to flow into the small imperfections of metal surfaces. GASGACINCH includes heat-resistant formulated compounds and contains NO HEAT RETAINING metal powders. Because of its superior composition, GASGACINCH has the versatility for a broad range of applications not found in other sealants. GASGACINCH's proven performance is preferred in nearly all mechanical industries including: auto repair, diesel and truck repair, high-performance engine builders, motorcycle repair and many more.
Ranking the Brands
: 10.00%
BlueDevil Products: 20.00%
KALIMEX LTD: 10.00%
K&W: 10.00%
Bar’s Leaks: 20.00%
Gasgacinch: 10.00%
STEEL SEAL: 10.00%
Permatex: 10.00%

Comparison Table

Сomparison: Bar's Leak HG-1 HEAD SEAL Blown Head Gasket Repair: imageСomparison: BlueDevil Head Gasket Sealer (38386): imageСomparison: K-Seal ST3501 Pour and Go Permanent Head Gasket and Block Repair: imageСomparison: BlueDevil Pour-N-Go Head Gasket Sealer: imageСomparison: K&W 401224 FiberLock Head Gasket & Block Repair - 32 Fl Oz: imageСomparison: Bar's Leaks Block Seal Head Gasket Fix: imageСomparison: Gasgacinch 440-B Gasket Sealer and Belt Dressing, 8 oz: imageСomparison: STEEL SEAL SSAMZ Head Gasket Repair: imageСomparison: Bar's Leaks 1100 Head Gasket Repair - 20 oz.: imageСomparison: Permatex 20539 Indian Head Gasket Shellac Compound, 2 oz.: image
Bar’s Leak HG-1 HEAD SEAL Blown Head Gasket RepairBlueDevil Head Gasket Sealer (38386)K-Seal ST3501 Pour and Go Permanent Head Gasket and Block RepairBlueDevil Pour-N-Go Head Gasket SealerK&W 401224 FiberLock Head Gasket & Block Repair – 32 Fl OzBar’s Leaks Block Seal Head Gasket FixGasgacinch 440-B Gasket Sealer and Belt Dressing, 8 ozSTEEL SEAL SSAMZ Head Gasket RepairBar’s Leaks 1100 Head Gasket Repair – 20 oz.Permatex 20539 Indian Head Gasket Shellac Compound, 2 oz.
SizePack of 11 PackPack of 18 Ounces1 Pack2 Ounce
ManufacturerBlueDevil ProductsSolv-TecABlueDevil ProductsCRCBar’s LeaksGasgacinchSteel Seal LtdBar’s LeaksPermatex
BrandBlueDevil ProductsKALIMEX LTDBlueDevil ProductsK&WBar’s LeaksGasgacinchSTEEL SEALPermatex
Item Weight2.87 pounds1 pounds1 pounds2.4 pounds1.5 pounds8 ounces1.32 pounds1.41 pounds1.6 ounces
Is Discontinued By ManufacturerNoNoNoYesNoYesNoNo
Product Dimensions2.5 x 2.5 x 8 inches2.75 x 2.75 x 5.5 inches3.4 x 3.4 x 9.54 inches9.5 x 2.6 x 2.5 inches3.7 x 2.7 x 2.6 inches3.15 x 1.57 x 7.87 inches1.8 x 3.4 x 8.3 inches1.25 x 3.69 x 1.25 inches

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