Top 10 Best Engine Block Sealer Reviews With Products List

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Are you looking for Engine Block Sealer Reviews? Our experts found 47393 number of feedback online for "Engine Block Sealer" and shortlisted them. This suggestions is created for those looking for their ideal Engine Block Sealer. On selected products for the Best Engine Block Sealer you will see ratings. The rating matrix we have generated is based on user ratings found online. Take a look -

Comparison Chart for Best Engine Block Sealer

We found 47393 reviews when researching. We have considered users feedback on the Engine Block Sealer and our suggestions includes only the finest of them in this article.

NoProductScoreAction
1Blue Magic 1116 Liquid Glass Metallic Seal-Up - 22.8 oz9.8Check Latest Price
2K&W 401232 Permanent Head Gasket & Block Repair with Nanotechnology - 32 Fl Oz9.8Check Latest Price
3Bar's Leaks 1109 Block Seal Liquid Copper Intake and Radiator Stop Leak - 18 oz9.4Check Latest Price
4Bar's Leaks 1100 Head Gasket Repair - 20 oz9.2Check Latest Price
5K-Seal ST3501 Pour and Go Permanent Head Gasket and Block Repair9Check Latest Price
6BlueDevil Head Gasket Sealer (38386)9Check Latest Price
7Bar's Leak HG-1 HEAD SEAL Blown Head Gasket Repair9Check Latest Price
8CRC K&W 401016 Block Seal Permanent Metallic™ Block & Radiator Seal - 16 Oz8.6Check Latest Price
9K-Seal ST5516 HD Multi Purpose One Step Permanent Coolant Leak Repair8.6Check Latest Price
10K-Seal ST5501 Multi Purpose One Step Permanent Coolant Leak Repair8.2Check Latest Price

1. Blue Magic 1116 Liquid Glass Metallic Seal-Up – 22.8 oz

  • Permanent cooling system sealer
  • Liquid glass and copper formula
  • Seal withstands up to 2000 degrees Fahrenheit
  • Forms permanent copper-ceramic seal

2. K&W 401232 Permanent Head Gasket & Block Repair with Nanotechnology – 32 Fl Oz

  • Package length: 4.394 cm
  • Package width: 8.610 cm
  • Package height: 24.206 cm
  • Product Type: AUTO ACCESSORY

3. Bar’s Leaks 1109 Block Seal Liquid Copper Intake and Radiator Stop Leak – 18 oz

  • Seals larger leaks seals
  • Repairs heater core leaks
  • Repairs freeze plug leaks
  • Repairs blown head gaskets
  • Repairs blocks

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

  • Stops block leaks
  • Seals cracked cylinder heads and blocks
  • Repairs blown head gaskets
  • 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.
  • 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.
  • Included components: Unit, Instruction Guide

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

  • 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
  • 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.

6. BlueDevil Head Gasket Sealer (38386)

  • 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
  • Safe and easy to use
  • Permanent Repair

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

  • 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

8. CRC K&W 401016 Block Seal Permanent Metallic™ Block & Radiator Seal – 16 Oz

  • Permanent molecular seal that’s as strong as steel
  • Seals cracks & holes in cast iron and aluminum engine blocks, head gaskets, freeze plugs, and copper, aluminum and bi-material radiators & heater cores.
  • For use in all water-cooled diesel and gasoline vehicles
  • Withstands extreme pressure and temperatures of a cooling system and will not wash away
  • Professional grade formula exceeds ASTM D6107 for effectively sealing leaks in cooling systems

9. K-Seal ST5516 HD Multi Purpose One Step Permanent Coolant Leak Repair

  • Permanent coolant leak repair – Just shake, pour and go
  • 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.
  • 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.

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

  • Permanent coolant leak repair – Just shake, pour and go
  • 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.
  • 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.

How To Choose The Best Engine Block Sealer

Does the thought of finding a great Engine Block Sealer stress you out? Has your mind been juggling between choices when it comes to buying Engine Block Sealer in general, specifically regarding which model to choose?
If that’s the case, know that you’re not alone. Many people find it tough to buy the perfect Engine Block Sealer for themselves. We understand the stress associated with the buying process!

Since you’re here, you are obviously curious about Engine Block Sealer. You’ve been bombarded with information, so you need to find a reputable source with credible options before you make any decisions on which product would be best for your needs.

There are many sources that’ll provide you with that information- buying guides or ratings websites, word-of-mouth testimonials from friends or family members, online forums where users share their personal experiences, product reviews specifically found all over the internet and YouTube channels. Only thorough research will ensure that you get the right product.

But that’s not always easy, right? That's why we've taken time to compile a list of the best Engine Block Sealer in today's market, on your behalf, so that there will be no more worries for you.

How did we come up with the list, you ask? How did we create this buying guide?

  • First, our algorithms collected as much information available about these products from trusted sources.
  • We employed both Artificial Intelligence and large data volume to validate all collected information.
  • Then our AI ranked them on their quality-to-price ratio using industry-standard criteria that let us pick the best Engine Block Sealer currently on the market!
The products aren’t chosen randomly. We consider several criteria before assembling a list. Some of the criteria are discussed below-

  1. Brand Value: What happens when you go for a not-so-reputable brand just because the price seems cheap? Well, the chance of getting a short-lasting product goes higher. That’s because the renowned brands have a reputation to maintain, others don’t.


Top Engine Block Sealer brands try to offer some unique features that make them stand out in the crowd. Thus hopefully, you’ll find one ideal product or another in our list.

  1. Features: You don’t need heaps of features, but useful ones. We look at the features that matter and choose the top Engine Block Sealer based on that.
  2. Specifications: Numbers always help you measure the quality of a product in a quantitative way. We try to find products of higher specifications, but with the right balance.
  3. Customer Ratings: The hundreds of customers using the Engine Block Sealer before you won’t say wrong, would they? Better ratings mean better service experienced by a good number of people.
  4. Customer Reviews: Like ratings, customer reviews give you actual and trustworthy information, coming from real-world consumers about the Engine Block Sealer they used.
  5. Seller Rank: Now, this is interesting! You don’t just need a good Engine Block Sealer, you need a product that is trendy and growing in sales. It serves two objectives. Firstly, the growing number of users indicates the product is good. Secondly, the manufacturers will hopefully provide better quality and after-sales service because of that growing number.
  6. Value For The Money: They say you get what you pay for. Cheap isn’t always good. But that doesn’t mean splashing tons of money on a flashy but underserving product is good either. We try to measure how much value for the money you can get from your Engine Block Sealer before putting them on the list.
  7. Durability: Durability and reliability go hand to hand. A robust and durable Engine Block Sealer will serve you for months and years to come.
  8. Availability: Products come and go, new products take the place of the old ones. Probably some new features were added, some necessary modifications were done. What’s the point of using a supposedly good Engine Block Sealer if that’s no longer continued by the manufacturer? We try to feature products that are up-to-date and sold by at least one reliable seller, if not several.
  9. Negative Ratings: Yes, we take that into consideration too! When we pick the top rated Engine Block Sealer on the market, the products that got mostly negative ratings get filtered and discarded.
These are the criteria we have chosen our Engine Block Sealer on. Does our process stop there? Heck, no! The most important thing that you should know about us is, we're always updating our website to provide timely and relevant information.

Since reader satisfaction is our utmost priority, we have a final layer of filtration. And that is you, the reader! If you find any Engine Block Sealer featured here Incorrect, irrelevant, not up to the mark, or simply outdated, please let us know. Your feedback is always welcome and we’ll try to promptly correct our list as per your reasonable suggestion.