Repairing Cracked Engine Blocks Without Disassembly | Know Your Parts

Best Engine Block Sealer on August 2020 Shopping Deals at

  • CRC 401016 Metallic Block Seal-16 Oz. Can, 16. Fluid_Ounces,

    • UPC: 078372010163
    • ASIN: B000CIPV5E
    • Brand: CRC
    • Size: 16 Ounce
    • Manufacturer: CRC

    Forms a permanent molecular bond that's as strong as steel. Seals cracks & holes in cast iron & aluminum engine blocks, head gaskets, freeze plugs, & copper, aluminum & bi-material radiators & heater cores. Tested by an Independent test lab. Rated No.1

  • Blue Magic 1008 Liquid Glass Metallic Seal-Up - 11.4 oz.

    • UPC: 728489010081
    • ASIN: B002UJ4WS0
    • Brand: Blue Magic
    • Size: 11.4 Ounce
    • Manufacturer: Blue Magic

    CarGo Seal-Up liquid glass metallic formula will seal cracks permanently. Works excellent on sealing engine blocks, radiators, heater cores and freeze plugs.

  • K&W 401224-6 FiberLock Head Gasket & Block Repair - 32 Fl Oz

    • UPC: 078372012242
    • ASIN: B006OW2PIS
    • Brand: K&W
    • Size: 32 Fluid Ounces
    • Manufacturer: CRC

    Permanent pour 'n go head gasket & block repair compatible with all types of antifreeze. Repairs cooling system leaks w/3 unique technologies: military-strength fibers nanotechnology & Cool-X Conditioner-the ultimate solution for all coolant leaks.

  • Moroso 35500 Ceramic Engine Seal - 1 Pint

    • UPC: 084663355004
    • ASIN: B000COU1TE
    • Brand: Moroso
    • Manufacturer: Moroso

    The best Chemical Sealer you can buy to stop cooling system leaks Works equally well in aluminum or cast-iron blocks Cooling system must be thoroughly clean before use Does not work with antifreeze If this doesn't stop the leaks, find yourself a welder!

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

    • UPC: 855959003080
    • ASIN: B00QYZIVA6
    • Brand: KALIMEX LTD
    • Size: 16 fl. oz, 1 Pack
    • Manufacturer: Solv-TecA

    K-Seal ULTIMATE is the simple, permanent fix for blown head gaskets, cracked heads and blocks, and porous engine blocks. Our unique formula works with all water-cooled engines – there’s no need to drain or flush your cooling system, and it doesn’t matter what kind of antifreeze or coolant you’ve used previously. Simply shake the bottle, pou... [Read More]

  • BlueDevil Head Gasket Sealer - 32 ounce(38386)

    • UPC: 663536383865
    • ASIN: B000NOO798
    • Brand: BlueDevil Products
    • Manufacturer: BlueDevil Products

    BlueDevil Head Gasket Sealer will repair and seal leaks in blown head gaskets, warped or cracked heads, heater cores, and freeze plugs.

  • K&W 401232 32 Fluid Ounce Automotive Accessories

    • UPC: 078372012327
    • ASIN: B000M8NZ70
    • Brand: K&W
    • Size: 32 Fluid Ounce
    • Manufacturer: K&W

    Permanent Head Gasket and Block Repair, Container Size 32 Oz, Size/Net Weight 32 Fl Oz, Copper, Bottle, Metallic Copper Liquid, 11 to 11. 5 pH, Boiling Point 212 F, Flash Point None F, 1. 15 Specific Gravity, For Use With Engine Blocks, Heater Cores, Freeze Plugs, Cooling Systems, Cylinder Heads, Radiators

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

    • UPC: 046087011362
    • ASIN: B003RGIWO0
    • Brand: Bar's Leaks
    • Size: Pack of 1
    • Manufacturer: Bar's Leaks

    Bar's Leaks Head Gasket and Cooling Sealant repairs blown head and intake gasket leaks. Seals cracked cylinder heads and blocks. Stops heater core and radiator leaks. Fixes leaking freeze and core plugs.

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

    • UPC: 812646010004
    • ASIN: B001QT9KO6
    • Brand: K-Seal
    • Manufacturer: K-Seal

    K-Seal 8 fluid ounce bottle is effective to 20 quarts cooling capacity. Just shake, pour and go. It repairs leaks and cracks in radiator, head gasket, heater core, freeze plugs, water pump casing, cylinder heads and engine blocks.

  • Bar's Leaks 1109 Block Seal Liquid Copper Intake and Radiator Stop Leak - 18 oz.

    • UPC: 046087011096
    • ASIN: B002PX91OG
    • Brand: Bar's Leaks
    • Size: Pack of 1
    • Manufacturer: Bar's Leaks

    It’s part of life: older cars, trucks, vans, SUVs and even RVs can develop larger leaks in their radiators and intake manifolds. If you’ve tried regular stop leak products, you know they are not powerful enough to stop these larger leaks. If you visit the service center down the street, you know just how expensive it can be to repair an intake ... [Read More]

  • Bar's Leaks 1100 Head Gasket Repair - 20 oz.

    • UPC: 046087011003
    • ASIN: B000OO04MQ
    • Brand: Bar's Leaks
    • Size: 1 Pack
    • Manufacturer: Bar's Leaks

    Suddenly noticing your temperature gauge spring towards the high end is not the best way to start your day. School, work, errands — your daily routine should not be compromised due to head gasket problems. When you experience this problem, you probably think about the time and money that will be spent in search of a block seal solution. But there... [Read More]

  • Genuine GM (12378255) Fluid 3634621 Cooling System Seal Tablet - 4 Grams, (Pack of 5)

    • ASIN: B000QIH3C4
    • Brand: Genuine GM
    • Size: Pack of 5
    • Manufacturer: GM

    Original organic formula designed for use in radiator systems to seal leaks and prevent leaks due to casting porosity in engine components. Seals minor leaks and porosity in cooling systems. DEX-COOL compatible. Non-toxic.

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

    • UPC: 046087011119
    • ASIN: B0036VRQ70
    • Brand: Bar's Leaks
    • Size: Pack of 1
    • Manufacturer: Bar's Leaks

    If the words “blown head gasket” make you nervous, we’re right there with you. We know firsthand that fixing a blown head gasket requires a hefty chunk of change and a few days without your car. Who has time to spend taking their car to the shop for a blown head gasket? And who has the extra cash to pay for a blown head gasket without plannin... [Read More]

  • Permatex 82194 Ultra Grey Rigid High-Torque RTV Silicone Gasket Maker, 3.5 oz.

    • UPC: 686226821942
    • ASIN: B000HBGI8K
    • Brand: Permatex
    • Size: Pack of 1
    • Manufacturer: Permatex

    Permatex Ultra Grey Rigid High-Torque RTV Silicone Gasket Maker is designed specially for high-torque and high vibration applications, like those common in import engines. This premium RTV gasket maker exceeds manufacturers' performance requirements, featuring maximum vibration resistance and outstanding resistance to oils, cooling and shop fluids.... [Read More]

  • BlueDevil Radiator & Block Sealer

    • UPC: 891838002058
    • ASIN: B00N3XVNXE
    • Brand: BlueDevil Products
    • Manufacturer: BlueDevil Products

    BlueDevil Radiator & Block Sealer is an easy-to-use formula that will repair and seal leaks in radiators and/or engine blocks. It does not contain solid or fibrous materials and will not clog or harm cooling systems. It will bond to plastic, cast iron, aluminum, alloy or metal. BlueDevil Radiator & Block Sealer is compatible in gasoline and diesel ... [Read More]

  • Hapco Products - Pro-Seal (Pack of 2)

    • ASIN: B07DVZCT5M
    • Brand: Hapco Products Co.
    • Size: Pack of 2
    • Manufacturer: Hapco Products Co.

    Hapco Pro-Seal is the most concentrated leak sealant that we offer! It is easy to use and guarantees a fast, permanent seal in any fluid system. This formula brings all rubber seals that suffer from age and wear, back to their original condition to help prevent future leaks. Does not contain particles or solvents and will not harm any seals. For Be... [Read More]

  • Blue Magic 16402 QuikSteel Aluminum Repair Aluminum Reinforced Epoxy Putty - 2 oz.

    • UPC: 728489164029
    • ASIN: B002UJ4WVC
    • Brand: Blue Magic
    • Size: 2 Ounce
    • Manufacturer: Blue Magic

    CarGo QuikSteel Aluminum reinforced epoxy putty sets in 5 minutes and cures in 1 hour. Great for household and automotive aluminum repair, lawn chairs, gutters, boats, aluminum radiators and many more applications.

  • Prestone AS661 Engine Block Stop Leak with Kevlar, 16.5 fl. oz.

    • UPC: 797496879493
    • ASIN: B019W8CNNC
    • Brand: Prestone
    • Size: 16.5 fl. oz.
    • Manufacturer: Prestone

    Prestone Triple Seal Protection Engine Block Stop Leak made with DuPont Kevlar resin stops cooling system leaks fast without blocking or corroding the cooling system. Simply add Engine Block Stop Leak to any color of antifreeze/coolant and Prestone's proprietary Triple Seal Protection begins to seek out and seal leaks. Do-it-yourselfers can now aff... [Read More]

  • ENGINE REVIVE Hyper Seal Head Gasket Repair

    • ASIN: B00GWP8TRS
    • Brand: ENGINE REVIVE
    • Manufacturer: HI GEAR PRODUCTS INC

    HYPER-SEAL LIQUID METAL HEAD GASKET SEALANT SUITABLE FOR PETROL OR DIESEL ENGINES Hyper seal will repair blown head gaskets and stregthen weak ones, if your car has done over 60k miles we recommend you use Hyper Seal to strength your head gasket and avoid costly repair bills. This revolutionary 'liquid metal' is made in the USA and PERMANENTLY REPA... [Read More]

  • BlueDevil Pour-N-Go Head Gasket Sealer - 16 Ounce (00209)

    • UPC: 891838002096
    • ASIN: B004500M8G
    • Brand: BlueDevil Products
    • Size: 16 Quart
    • Manufacturer: BlueDevil Products

    BlueDevil Head Gasket Sealer is formulated for the Do-it-Yourself customer who has limited time, or is not mechanically inclined. The 16 Ounce is intended for the customer seeking a single repair on a 4 or 6 cylinder engine.

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