Bar's Leaks 1100 Block Seal Head Gasket Sealant  Automotive Additive, 20 oz
Bar's Leaks 1100 Block Seal Head Gasket Sealant  Automotive Additive, 20 oz
Hero image 0 of Bar's Leaks 1100 Block Seal Head Gasket Sealant Automotive Additive, 20 oz, 0 of 2

Bar's Leaks 1100 Block Seal Head Gasket Sealant Automotive Additive, 20 oz

4.7 stars out of 478 reviews
(4.7)|
478 ratings

Key item features

  • Effective Repairs: Repairs blown head gaskets, cracked heads, and blocks, as well as intake gasket leaks.
  • Coolant Leak Prevention: Stops all coolant leaks, addressing the root cause of most overheating problems.
  • Durable Formula: Contains aramid and refractory fibers, providing strength similar to a bulletproof vest and heat resistance like fire-proof clothing.
  • Permanent Seal: Forms a hard, permanent ceramic-type seal by locking particles together in cracks or blown head gasket areas.
  • Vehicle Compatibility: Suitable for vehicles that can idle for 20 minutes without overheating or needing additional coolant.
  • Material Versatility: Works effectively on both cast iron and aluminum blocks and heads.
  • Detailed Instructions: Comes with a back booklet label that provides step-by-step instructions for using the product.
Generated by AI
Current price is $16.79
Price when purchased online
  • Free 90-day returns
Subscribe, Your usuals, on your schedule, Save time and stay stocked!, $16.79
One-time purchase $16.79

How do you want your item?

Try 30 days for just $1! Choose annual plan at checkout.
How do you want your item?
Columbus, 43215
Arrives by Tomorrow
.
Order within 8 hr 55 min
Fulfilled by Walmart
4.460404435746901 stars out of 5, based on 7677 seller reviews(4.5)
Report an issue with this seller
Free 90-day returns
Other sellers
$15.50
+Free shipping
Shipping, arrives by Fri, Feb 27 to Columbus, 43215
Sold and shipped by RR1Merc
Free 30-day returns
walmart plus

Try Walmart+ for just $1 & get a year for $75

T&C apply.
Claim offer now

About this item

Product details

Specifications

Warranty

Warnings

Customer ratings & reviews

4.7 out of 5 stars
stars478 ratings468 reviews
How item rating is calculated

Reviews summary

Pros
  • : Provides value compared to alternatives.
  • : Runs smoothly without water contamination.
  • : Operates without overheating issues.
  • : Stops leaks quickly in most cases.
Neutral
  • : Can be effective at stopping overheating, but may not seal head gasket leaks in all cases.
Generated by AI

Customer images

  • +6 images
Filtered and sorted results would be available on the new 'Customer ratings & reviews' page.
Sort by |

Showing 1-3 of 468 reviews

Jan 28, 2025
anonymous
Top Reviewer
Sold byNature's HealthDelivered byWalmart
5 out of 5 stars review

Verified Purchase

works great for older cars....

I have used this product before with great, long-lasting results. I use this sealant in my second car that I only drive around town, no long trips, with no leaks at all....

Helpful?41HFQF2DDQPZ52628129
Sep 27, 2025
Thamus
5 out of 5 stars review

awesome product

I've used this product two times and two different cars and absolutely works hands down. Seems a lot of money on having to do a head gasket job. This is a carbon fiber product and it really bonds really good. Totally fix my car no more radiator fluid coming out of my tailpipe. Totally recommend this

Review from Rislone
Helpful?41HFQF2DDQPZ52628129
Oct 18, 2025
Emptycanz
5 out of 5 stars review

They really work!

[This review was collected as part of a promotion.] I bought multiple products from the bars leaks lineup and they haven't disappointed yet so I'm hoping that this head seal gasket repair works, and I'll update as soon as I know. If this one works, I will be a lifelong customer

Review from Rislone
Helpful?41HFQF2DDQPZ52628129