Bar's Leaks Block Seal Liquid Copper

Bar's Leaks Block Seal Liquid Copper

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: PartLimit

$11.99 Regular price $23.99

About This Item We aim to show you accurate product information. Manufacturers, suppliers and others provide what you see here, and we have not verified it. Metallic Block...


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About This Item

We aim to show you accurate product information. Manufacturers, suppliers and others provide what you see here, and we have not verified it.
Metallic Block Seal

Permanently Repairs Larger Leaks in Radiators Intake Manifolds & Gaskets Heater Cores, Blocks, Heads & Freeze Plugs

Permanently Fixes Cooling System Leaks
Sealing Liquid
Liquid penetrates large and small leaks in plastic, aluminum and cast iron intakes, heads, blocks and radiators.

Stop Leak Fibers
Fiber additives lock together with liquid to increase strength and promote a permanent seal in gasket leaks.

Use with All types of antifreeze including conventional green or blue (Silicate-based) and extended life red/orange or yellow (OAT/HOAT) coolant.

Seals larger leaks regular stop leaks won't. Use on cars, trucks, vans, SUV's and RV's. Will not harm the cooling system when used properly. One bottle treats systems up to 6 gallons.

For severe leaks, like a blown head gasket, it is recommended to use Bar's Leaks® Head Gasket Fix or Head Gasket & Cooling Sealant
Product Features
  • Permanent cooling system
  • Intake & radiator
  • Stop leak
  • Antifreeze compatible
  • Sodium silicate
  • Liquid glass formula
  • Pour directly into radiator
  • No draining required
  • Works with all types of antifreeze

Bar's Products,
P.O. Box 187,
Holly, MI, 48442.


Instructions: . Directions:. ➊ Allow engine to cool. Make sure engine is cool enough so radiator cap can be safely removed. ➋ Shake well. Pour Liquid Copper™ Block Seal directly into radiator. If using in a small cooling system, such as 4 cylinders with no air conditioning, install 1/2 of bottle. Tip: If you do not have access to your radiator, remove top hose where it connects to the top of the radiator and install product in hose. Reattach hose and tighten clamp. If you have a pressurized overflow tank, you can install in tank. ➌ Fill radiator and overflow tank to proper level and reinstall radiator cap. ➍ Turn heater on hot and fan on high. ➎ Start vehicle and idle engine for 5 minutes. ➏ Turn vehicle off and allow engine to cool. ➐ Top off radiator and leave Bar's Leaks® Liquid Copper™ in cooling system for continued protection. Drive vehicle as normal.


Bar's Leaks
Manufacturer Part Number
Assembled Product Weight
1.3 lbs
Assembled Product Dimensions (L x W x H)
7.40 x 2.60 x 2.60 Inches

Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the 'Complete Orders' link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.


We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.