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20 Best Engine Block Sealer For Cracked Block (2022 Updated)

Engine block sealer is a product that is used to repair cracks in engine blocks. It is a thick, viscous liquid that is poured into the crack and then allowed to harden. Once it has hardened, it forms a seal that prevents oil and coolant from leaking out of the crack.

20 Best Engine Block Sealer For Cracked Block

Product Image Product Name Features Price

Bar's Leaks Block Seal Head Gasket Fix – 24 oz bottle

  • Safely seals gasket leaks
  • Quickly stops coolant leaks
  • Easy to use

K Seal Heavy Duty Permanent Coolant Leak Sealer – 16 oz jug

  • Item Weight 544 g
  • Product Dimensions 15 x 10.4 x 4.8 cm
  • Item Weight 544 gm

K-Seal Permanent Leak Repair for Radiators, Head Gaskets, Blocks

  • Mixes with all antifreeze
  • No draining or flushing
  • Fixes cracks and leaks in radiator, head gasket, freeze plugs, cylinder heads, heater core, water pump casing and engine blocks

Bar's Leaks Head Gasket Repair – 20 fl oz bottle

  • Stops block leaks
  • Seals cracked cylinder heads and blocks
  • Repairs blown head gaskets

Bar's Leaks Engine Repair – 16.9 oz

  • Increases oil pressure
  • Reduces friction
  • Helps clean internal parts

Permatex Gasket Sealant, Form-A, No. 1 – 11 oz

  • Brush-top sealant approved for use in aviation as well as automotive applications
  • Provides an excellent seal to protect against leakage

Bar's Leaks – 11 oz. Radiator Stop Leak

  • Works with any color antifreeze
  • Stops leaks and drips from wear and age
  • Harmless to rubber, aluminum & other metals

3M Fire Block Sealant, Gray – 10.1 oz bottle

  • SEAL INTERIOR CONSTRUCTION VOIDS: Superior adhesion strength, caulk rate and non-sag application, plus a halogen-free formula. No mixing required.

Permatex 85144 The Right Stuff Grey Gasket Maker 7.5 oz.

  • Blowout resistant, allowing leakproof gaskets to be made and put into service in just one minute
  • Sensor-safe, seals instantly, forming a reliable, long lasting elastomeric rubber gasket that outperforms precut gaskets

Rislone 4447 Compression Repair

  • Frees sticky rings and fills gaps & scratches in cylinder walls
  • Eliminated blow-by and compression loss while also reducing friction and wear

Moroso 35500 – Ceramic Engine Seal

  • 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

Leak Stopper Rubber Flexx Sealant, 18 oz.

  • Tops Roof Leaks Instantly
  • Seals and Protects
  • Easy Spray Application

Chemical Guys Jet Seal Sealant and Paint Protectant – 16 us fl oz (473 ml)

  • All new formulation
  • Protection against the harshest elements
  • Lasts up to 12 months

Permatex Indian Head Gasket Shellac Compound – 2 fl oz 20539

  • 2 fl oz Bottle

Hi-Gear HG9048s Insta-Seal Permanent Block Sealer – 8 fl. oz.

  • Hi-Gear HG9048s Insta-Seal Permanent Block Sealer – 236 millilitres
  • Hi-Gear Insta-Seal quickly and permanently seals large and small leaks in blown head gaskets

K-Seal Coolant Leak Repair, Head Gasket Sealant, Block Sealer, Radiator, Heater Core Stop Leak, ST5501

  • Advanced ceramic forumla Product Features: Anyone can use this product.
  • No Flushing or Draining.
  • You can even pour into the overflow tank. Mixes w/all types of antifreeze Just shake, pour & go.

Holts Ww500 Wondarweld, 500 ml

  • Permanently seals cracked cylinder blocks, internal and external leaks in water jacket.
  • Suitable for steel, iron and aluminium engines.

CRC – 401214×6 – K&W Instant Cooling System Stop Lea

  • ItemNumber#C28401214X6
  • Using Nanotechnology, This Product Fills In Cracks And Crevices Other Products Can’t, Making A Stronger, More Solid Bond Than Competitors’ Products

Eastwood Autobody Seam Sealer Cartridge Black 51655Z

  • Stays flexible; won’t crack
  • Waterproofs and insulates
  • For firewalls, floor pans, trunk seams, fender extensions, taillight openings

Bar's Leaks 1010 Grey Engine Oil Stop Leak – 11 oz.

  • Front to Back:1.8 -Overall Width.
  • Side to Side:3 -Overall Height.
  • Top to Bottom:6.
Bar's Leaks Block Seal Head Gasket Fix – 24 oz bottle
  • Safely seals gasket leaks
  • Quickly stops coolant leaks
  • Easy to use
K Seal Heavy Duty Permanent Coolant Leak Sealer – 16 oz jug
  • Item Weight 544 g
  • Product Dimensions 15 x 10.4 x 4.8 cm
  • Item Weight 544 gm
K-Seal Permanent Leak Repair for Radiators, Head Gaskets, Blocks
  • Mixes with all antifreeze
  • No draining or flushing
  • Fixes cracks and leaks in radiator, head gasket, freeze plugs, cylinder heads, heater core, water pump casing and engine blocks
Bar's Leaks Head Gasket Repair – 20 fl oz bottle
  • Stops block leaks
  • Seals cracked cylinder heads and blocks
  • Repairs blown head gaskets
Bar's Leaks Engine Repair – 16.9 oz
  • Increases oil pressure
  • Reduces friction
  • Helps clean internal parts
Permatex Gasket Sealant, Form-A, No. 1 – 11 oz
  • Brush-top sealant approved for use in aviation as well as automotive applications
  • Provides an excellent seal to protect against leakage
Bar's Leaks – 11 oz. Radiator Stop Leak
  • Works with any color antifreeze
  • Stops leaks and drips from wear and age
  • Harmless to rubber, aluminum & other metals
3M Fire Block Sealant, Gray – 10.1 oz bottle
  • SEAL INTERIOR CONSTRUCTION VOIDS: Superior adhesion strength, caulk rate and non-sag application, plus a halogen-free formula. No mixing required.
Permatex 85144 The Right Stuff Grey Gasket Maker 7.5 oz.
  • Blowout resistant, allowing leakproof gaskets to be made and put into service in just one minute
  • Sensor-safe, seals instantly, forming a reliable, long lasting elastomeric rubber gasket that outperforms precut gaskets
Rislone 4447 Compression Repair
  • Frees sticky rings and fills gaps & scratches in cylinder walls
  • Eliminated blow-by and compression loss while also reducing friction and wear
Moroso 35500 – Ceramic Engine Seal
  • 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
Leak Stopper Rubber Flexx Sealant, 18 oz.
  • Tops Roof Leaks Instantly
  • Seals and Protects
  • Easy Spray Application
Chemical Guys Jet Seal Sealant and Paint Protectant – 16 us fl oz (473 ml)
  • All new formulation
  • Protection against the harshest elements
  • Lasts up to 12 months
Permatex Indian Head Gasket Shellac Compound – 2 fl oz 20539
  • 2 fl oz Bottle
Hi-Gear HG9048s Insta-Seal Permanent Block Sealer – 8 fl. oz.
  • Hi-Gear HG9048s Insta-Seal Permanent Block Sealer – 236 millilitres
  • Hi-Gear Insta-Seal quickly and permanently seals large and small leaks in blown head gaskets
K-Seal Coolant Leak Repair, Head Gasket Sealant, Block Sealer, Radiator, Heater Core Stop Leak, ST5501
  • Advanced ceramic forumla Product Features: Anyone can use this product.
  • No Flushing or Draining.
  • You can even pour into the overflow tank. Mixes w/all types of antifreeze Just shake, pour & go.
Holts Ww500 Wondarweld, 500 ml
  • Permanently seals cracked cylinder blocks, internal and external leaks in water jacket.
  • Suitable for steel, iron and aluminium engines.
CRC – 401214×6 – K&W Instant Cooling System Stop Lea
  • ItemNumber#C28401214X6
  • Using Nanotechnology, This Product Fills In Cracks And Crevices Other Products Can’t, Making A Stronger, More Solid Bond Than Competitors’ Products
Eastwood Autobody Seam Sealer Cartridge Black 51655Z
  • Stays flexible; won’t crack
  • Waterproofs and insulates
  • For firewalls, floor pans, trunk seams, fender extensions, taillight openings
Bar's Leaks 1010 Grey Engine Oil Stop Leak – 11 oz.
  • Front to Back:1.8 -Overall Width.
  • Side to Side:3 -Overall Height.
  • Top to Bottom:6.

1. Bar’s Leaks Block Seal Head Gasket Fix – 24 oz bottle

Bar's Leaks Block Seal Head Gasket Fix - 24 oz bottle

  • Safely seals gasket leaks
  • Quickly stops coolant leaks
  • Easy to use
  • Pour directly into radiator
  • No draining required

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Product Details

Specifications

Details
Item has MSDS (SDS)? Y
Special Instructions 1 to 1.5 gallons cooling capacity use 1/2 bottle. 1.5 gallon to 4 gallon cooling capacity use 1 bottle. Larger systems use 1 bottle for every 4 gallons of coolant capacity.
Package Weight 1.6
Package Weight UOM LB
Net Packaged Quantity 1 BO

Reviews From Real Customers

Starchild
Prius Issues
Mdadio

2. K Seal Heavy Duty Permanent Coolant Leak Sealer – 16 oz jug

K Seal Heavy Duty Permanent Coolant Leak Sealer - 16 oz jug

  • Item Weight 544 g
  • Product Dimensions 15 x 10.4 x 4.8 cm
  • Item Weight 544 gm

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eBay
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JBTools.com

Product Details

Specifications

Details
Product Dimensions 5.9 x 4.1 x 1.9 inches
Country of Origin USA
Is Discontinued By Manufacturer No

Reviews From Real Customers

H.G.R.
D.B.P.

3. K-Seal Permanent Leak Repair for Radiators, Head Gaskets, Blocks

K-Seal Permanent Leak Repair for Radiators, Head Gaskets, Blocks

  • Mixes with all antifreeze
  • No draining or flushing
  • Fixes cracks and leaks in radiator, head gasket, freeze plugs, cylinder heads, heater core, water pump casing and engine blocks
  • Just shake, pour and go

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Amazon.com

Product Details

Specifications

Details
Product Dimensions 7.87 x 2 x 6 inches
Country of Origin USA
Is Discontinued By Manufacturer No

Reviews From Real Customers

Chato
Timo

4. Bar’s Leaks Head Gasket Repair – 20 fl oz bottle

Bar's Leaks Head Gasket Repair - 20 fl oz bottle

  • Stops block leaks
  • Seals cracked cylinder heads and blocks
  • Repairs blown head gaskets

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Product Details

Specifications

Details
Item has MSDS (SDS)? Y
Special Instructions Head Gasket Repair is NOT COMPATIBILE with antifreeze and must only be added to cooling system and radiator after ALL ANTIFREEZE has been removed. 1 to 2.0 Gallon cooling capacity use 1/2 bottle. 2.0 Gallon to 6 Gallon cooling capacity use 1 bottle. Larger systems use 1 bottle for every 6 gallons of coolant capacity.
Item is Shipped at this Packaging Level N
Information Effective Date 2011-10-18 12:00:00
Layers Per Pallet 5

5. Bar’s Leaks Engine Repair – 16.9 oz

Bar's Leaks Engine Repair - 16.9 oz

  • Increases oil pressure
  • Reduces friction
  • Helps clean internal parts
  • Quiets noise
  • Reduces oil consumption

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Product Details

Specifications

Details
Item has MSDS (SDS)? Y
Special Instructions If using Engine Repair when changing oil, add entire contents of bottle after filter is changed. Then refill with manufacturer’s recommended oil to proper level. Drive vehicle and recheck oil level.
Net Packaged Quantity 1 BO
Package Size 16 oz
Flash Point 380 °F

Reviews From Real Customers

B.L.

6. Permatex Gasket Sealant, Form-A, No. 1 – 11 oz

Permatex Gasket Sealant, Form-A, No. 1 - 11 oz

  • Brush-top sealant approved for use in aviation as well as automotive applications
  • Provides an excellent seal to protect against leakage
  • Slow drying, flexible setting

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Amazon.com
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Walmart
Summit Racing

Product Details

Specifications

Details
Units in Package 1
Unit Size 11 oz
Directions Directions: 1. Clean surfaces thoroughly. 2. Pierce top and apply a thin, even film to both mating surfaces. 3. Allow to air dry until material becomes tacky. 4. Assemble and tighten into position. 5. Wipe excess clean. Note: To remove sealant from hands, use isopropyl alcohol or denatured alcohol.
Warnings Warning: Cancer – www.P65Warnings.ca.gov. Warning: May cause allergic skin reaction. Read carefully other cautions on side panel. Warning: May cause cancer. Precautionary Statements- Prevention: Contains: Kaolin, Ethanol, 2-Propanol, Titanium Dioxide, Crystalline silica. Obtain special instructions before use. Do not handle until all safety precautions have been read and understood. Use personal protective equipment as required: Precautionary Statements- Response: If in Eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. If eye irritation persists: Get medical advice/attention. If on Skin: Wash with plenty of soap and water. Statements – Storage: Protect from sunlight. Store in a well-ventilated place. Store locked up. Precautionary Statements- Disposal: Dispose of contents/container to an approved waste disposal plant. Keep out of the reach of children.

Reviews From Real Customers

Sobig Egyptian Crocadile

7. Bar’s Leaks – 11 oz. Radiator Stop Leak

Bar's Leaks - 11 oz. Radiator Stop Leak

  • Works with any color antifreeze
  • Stops leaks and drips from wear and age
  • Harmless to rubber, aluminum & other metals

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Amazon.com – Seller
Walmart
AutoZone
Ace Hardware

Product Details

Specifications

Details
Product Type Stop Leak Concentrate
Container Size 11 oz
Brand Name Bar’s Leaks

Reviews From Real Customers

Kurt P
oguz1
foster

8. 3M Fire Block Sealant, Gray – 10.1 oz bottle

3M Fire Block Sealant, Gray - 10.1 oz bottle

  • SEAL INTERIOR CONSTRUCTION VOIDS: Superior adhesion strength, caulk rate and non-sag application, plus a halogen-free formula. No mixing required.
  • FAST DRY: Tack free in approximately 15 minutes.
  • BONDS TO MOST CONSTRUCTION SURFACES: Concrete, brick, gypsum, metals, wood, plastic, glass and cable jacketing.Coverage (linear ft.):29.
  • EASY TO CLEAN UP with water and no special handling routine disposal.
  • THIXOTROPIC: Will not sag or run in vertical or overhead applications. Minimal shrinkage.

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Amazon.com
Home Depot
Lowe’s
Ace Hardware

Product Details

Specifications

Details
Manufacturer Part Number FB136
Product Name Fire Block Sealant FB 136, 10.1 fl. oz., Cartridge, 12/case
Packaged Quantity 12
Product Type Sealant
Features Fire Resistant

Reviews From Real Customers

Jules F
kj298
Yes man

9. Permatex 85144 The Right Stuff Grey Gasket Maker 7.5 oz.

Permatex 85144 The Right Stuff Grey Gasket Maker 7.5 oz.

  • Blowout resistant, allowing leakproof gaskets to be made and put into service in just one minute
  • Sensor-safe, seals instantly, forming a reliable, long lasting elastomeric rubber gasket that outperforms precut gaskets
  • Resistant to powertrain fluids such as ATF, oil, and coolant
  • Withstands temperatures to 450F continuous, and 500F intermittent

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Walmart – Advance Auto Parts
JBTools.com

Product Details

Specifications

Details
Ingredients Polydimethylsiloxane (Cas 70131-67-8), Calcium Carbonate (Cas 471-34-1), Garnet Mineral (Cas 1302-62-1), Amorphous Silica (Cas 68909-20-6), Vinyl Oximinosilane (Cas 2224-33-1), Stearic Acid (Cas 57-11-4).
Units in Package 1
Unit Size 7.5 oz can

Reviews From Real Customers

Outdoor repair guy
karewhit-93
Member 3550804660

10. Rislone 4447 Compression Repair

Rislone 4447 Compression Repair

  • Frees sticky rings and fills gaps & scratches in cylinder walls
  • Eliminated blow-by and compression loss while also reducing friction and wear
  • Works with conventional, high mileage and synthetic engine oil
  • Does not contain any harmful lead or other metals that could damage the inside of your engine

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L&M Fleet Supply
MechanicSurplus.com

Product Details

Specifications

Details
Assembled Depth (in) 2.6 in
Assembled Height (in) 7.4 in
Assembled Width (in) 2.6 in
Item has MSDS (SDS)? Y
Package Weight 16.9

Reviews From Real Customers

StolenID
sportny
Yosia

11. Moroso 35500 – Ceramic Engine Seal

Moroso 35500 - Ceramic Engine Seal

  • 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
  • The best Chemical Sealer you can buy to stop cooling syste

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Behrent’s Performance Warehouse

Product Details

Specifications

Details
Length 11.3 in
Height 8.8 in
Width 8.4 in
Weight 1.6 lb

Reviews From Real Customers

Dr. Zero
cger2175
Tark

12. Leak Stopper Rubber Flexx Sealant, 18 oz.

Leak Stopper Rubber Flexx Sealant, 18 oz.

  • Tops Roof Leaks Instantly
  • Seals and Protects
  • Easy Spray Application
  • Flammability Extremely Flammable
  • Durability Excellent

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Lowe’s
Pro Solutions Direct

Product Details

Specifications

Details
Flash point -4° F
Specific Gravity 0.82
Solids Content 31%
VOC content Less than 59%, cannot exceed 60%
MIR value Less than 1.15, cannot exceed 1.20

Reviews From Real Customers

jude2425acts

13. Chemical Guys Jet Seal Sealant and Paint Protectant – 16 us fl oz (473 ml)

Chemical Guys Jet Seal Sealant and Paint Protectant - 16 us fl oz (473 ml)

  • All new formulation
  • Protection against the harshest elements
  • Lasts up to 12 months
  • Improved durability

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Product Details

Specifications

Details
Units in Package 1
Unit Size 16 fl oz
Directions Directions: Shake Well. Clean surface before application. Apply a thin, layer of Jet Seal by hand or machine at a low speed setting. Allow Jet Seal to dry for 20 minutes. Buff to a high gloss shine using a premium microfiber towel. Do not wash vehicle for 12 hours allowing Jet Seal to completely bond to the surface. Surface is now protected.
Warnings Warning! Combustible liquid. May be harmful if swallowed, may be harmful in, contact with skin, causes serious eye irritation, may be harmful if inhaled. If medical advice is needed, have product container or label at hand. Keep out of reach read label before use. If Swallowed: Call a Poison control center or doctor/physician if you feel unwell. Inhaled remove person to fresh air and keep comfortable for breathing. Call a poison control center or doctor physician if you feel unwell. If in Eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. If eye irritation persists get medical advice/attention, In case of fire: use dry chemical, foam, or carbon dioxide to extinguish fire. Water may be ineffective but should be used to cool fire exposed containers, structures and to protect personnel. Use water to dilute spills and to flush them away from sources of ignition. See Material Safety Data Sheet for further details regarding safe use of this product. Note: seller makes no warranty, expressed or implied, nor accepts any responsibility for any direct or consequential damages beyond purchase price since seller has no control over user’s handling or effect of use.

Reviews From Real Customers

Torred Charger
Gangsteroflove

14. Permatex Indian Head Gasket Shellac Compound – 2 fl oz 20539

Permatex Indian Head Gasket Shellac Compound - 2 fl oz 20539

  • 2 fl oz Bottle

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Product Details

Specifications

Details
Units in Package 1
Unit Size 2 fl oz
Directions For leakproof gaskets and threaded assemblies, apply a thin, even coat to both parts. Allow to dry, then assemble. Resists water, steam, petroleum products, and antifreeze.
Ingredients Rosin (8050-09-7), 2-Propanol (67-63-0), Vegetable Oil (68187-84-8).
Warnings Flammable. Harmful if swallowed. Eye irritant. Contains isopropyl alcohol. Do not use in presence of heat, sparks or open flame. Keep container closed when not in use. Avoid contact with eyes and skin. Do not breathe vapors. Do not swallow. If swallowed do not induce vomiting, call physician. For eye contact, flush with water for 15 minutes, call a physician. For skin contact, wash thoroughly with soap and water. If overcome by fumes, get fresh air. If this product is used in an OSHA regulated work place consult the MSDS available from your distributor before use. Keep out of the reach of children.

Reviews From Real Customers

sprrf
Hans

15. Hi-Gear HG9048s Insta-Seal Permanent Block Sealer – 8 fl. oz.

Hi-Gear HG9048s Insta-Seal Permanent Block Sealer - 8 fl. oz.

  • Hi-Gear HG9048s Insta-Seal Permanent Block Sealer – 236 millilitres
  • Hi-Gear Insta-Seal quickly and permanently seals large and small leaks in blown head gaskets
  • Works on cracked cylinder heads, heater matrix, core plugs and leaking radiators in all types of aluminum and cast iron engines
  • Hi-Gear Insta-Seal will not harm the cooling system when used correctly
  • Once the ‘weld’ is complete Hi-Gear Insta-Seal lasts the life of the engine

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MechanicSurplus.com

Product Details

Reviews From Real Customers

ranger7968
dynodougmb
nd-farmer

16. K-Seal Coolant Leak Repair, Head Gasket Sealant, Block Sealer, Radiator, Heater Core Stop Leak, ST5501

K-Seal Coolant Leak Repair, Head Gasket Sealant, Block Sealer, Radiator, Heater Core Stop Leak, ST5501

  • Advanced ceramic forumla Product Features: Anyone can use this product.
  • No Flushing or Draining.
  • You can even pour into the overflow tank. Mixes w/all types of antifreeze Just shake, pour & go.
  • Works in just minutes Works on Head Gaskets, Radiator, Heater Cores, Freeze Plugs, Water Pump Casings, Cylinder Heads & Cracked Blocks.

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Walmart
NAPA Auto Parts

Product Details

Reviews From Real Customers

C.J.

17. Holts Ww500 Wondarweld, 500 ml

Holts Ww500 Wondarweld, 500 ml

  • Permanently seals cracked cylinder blocks, internal and external leaks in water jacket.
  • Suitable for steel, iron and aluminium engines.
  • Prevents the need for engine rebuild.

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Amazon
yourspares.co.uk

Product Details

Specifications

Details
Volume 0.50 L
Part Manufacturer Number WW500

Reviews From Real Customers

GraemeO
Craigstamp90
Notdrnick

18. CRC – 401214×6 – K&W Instant Cooling System Stop Lea

CRC - 401214x6 - K&W Instant Cooling System Stop Lea

  • ItemNumber#C28401214X6
  • Using Nanotechnology, This Product Fills In Cracks And Crevices Other Products Can’t, Making A Stronger, More Solid Bond Than Competitors’ Products
  • Compatible With All Types Of Anti-Freeze

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AutoZone

Product Details

Specifications

Details
Appearance Lumpy Copper Liquid
Odor Mild
Container Size 15 fl oz (US)
Acts as Stop Leak No
SDS Required Yes

Reviews From Real Customers

Autologous1
Cuso
Rodger76

19. Eastwood Autobody Seam Sealer Cartridge Black 51655Z

Eastwood Autobody Seam Sealer Cartridge Black 51655Z

  • Stays flexible; won’t crack
  • Waterproofs and insulates
  • For firewalls, floor pans, trunk seams, fender extensions, taillight openings
  • Applies easily with your standard caulking gun

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eBay – eastwoodcompany
Eastwood Company

Product Details

Specifications

Details
Category Auto Body Repair

Reviews From Real Customers

Vince 261
eastwood.com
Steve53

20. Bar’s Leaks 1010 Grey Engine Oil Stop Leak – 11 oz.

Bar's Leaks 1010 Grey Engine Oil Stop Leak - 11 oz.

  • Front to Back:1.8 -Overall Width.
  • Side to Side:3 -Overall Height.
  • Top to Bottom:6.

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eBay

Product Details

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bmtemt2012
srojro1936
19ralph59

Conclusion

As the best sealer for a cracked engine block will vary depending on the severity and location of the crack(s). However, some common sealers used for cracked engine blocks include epoxy and polyurethane sealants, as well as metal-filled putties.

In general, it is best to consult with a mechanic or automotive engineer to determine the best sealer for your particular situation.

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