Liquid Copper

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Liquid Copper

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 gasket leak through a mechanic. Isn’t there a better way? There should be, which is why Bar’s Leaks designed the Liquid Copper Block Seal Intake & Radiator Stop Leak. This one-step sealer was designed to quickly and safely stop these overwhelming leaks. When you’re experiencing a mild to moderate intake gasket seal leak, discover the fast, effective, inexpensive power of liquid copper. Contact Us About This Product

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  • Can Bar’s Leaks® Liquid Copper™ Intake & Radiator Stop Leak be installed in existing antifreeze?

    Yes, unlike other copper stop leak products, Liquid Copper™ One Step sealer contains an antifreeze compatible sodium silicate formula, so draining of the cooling system is not required as long as manufactures recommendations are followed. It also can be used in water alone however, a second bottle of Liquid Copper™ is recommended to be added to the system once antifreeze is installed.

  • Will it work in the new extended life antifreeze?

    Yes, Liquid Copper™ is compatible with both conventional green or blue (silicate-based) and extended life red/orange or yellow (OAT/HOAT) 50-50 mix antifreeze.

  • Do I need to drain my cooling system after using Liquid Copper™?

    No, this product is designed to be left in the cooling system to protect from future leaks.

  • How does this type of product work?

    It stops leaks by forming a physical plug with organic and synthetic fibers, copper and an ionic modified mineral. The plug forms as the coolant and sealer flow out of the leak. A wetting agent cleans the sides of the hole and prepares the surface for bonding. The first fibers catch on the side of the leak or hole eventually bridging the entire hole. The fibers now act as a sieve trapping more fibers, copper particles and minerals, creating a composite plug. This plug is stabilized or cemented with a liquid glass. The liquid glass hardens with increased temperature and completes the seal.

  • How long does it take to see results?

    Results should be noticeable within 20 to 30 minutes. If the leak is not sealed in 30 minutes of running, mechanical repair may be needed.

  • What are the dosage recommendations?

    Use 1 (one) bottle for regular size cooling systems, this covers most 4, 6, 8 and 10 cylinder engines. For small cooling systems, such as 4 cylinders with no air conditioning, use 1⁄2 (half) of bottle. For other small systems use approximately 3 ounces per gallon of cooling capacity. In larger systems, use 1 (one) bottle for every 6 gallons of cooling system capacity.

  • Will Liquid Copper™ plug my heater core?

    No, Liquid Copper™will not plug a clean heater core. Note: If using Bar’s Leaks® to stop heater core leaks, make sure you turn your heater control to HOT. Some vehicles have a valve that controls coolant flow through the core and is only opened in the HOT position.

  • Can I install Liquid Copper™ in my overflow reservoir?

    For best results Liquid Copper™ should not be installed in a regular overflow tank unless it has a screw on pressurized cap. 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.

  • Will this work in both domestic and import cars and trucks?

    Yes, Liquid Copper™ will work in all types of water cooled vehicles.

  • I accidently added the Liquid Copper™ into my gas tank, what should I do?

    Liquid Copper™ is only designed to be added to the cooling system. If the product is accidentally installed in the gas tank, the tank should be removed and cleaned out by a professional mechanic.

  • I accidently added the Liquid Copper™ into my engine oil, what should I do?

    If the product is accidently installed in the engine oil and the engine has not been started, in many cases you can remove the valve cover where installed and drain the oil leaving the drain plug off. Then use an engine flush washing out the head giving special attention to the oil return holes that run down to the oil pan. Clean these out and pour the engine flush down these holes flushing everything into the oil pan and out the drain hole. If the engine has been run, the vehicle needs to be towed to a professional mechanic for evaluation. This might include taking the engine apart to clean all of the internal parts.

What does it do? Our formula permanently repairs larger leaks in radiators, intake manifolds and gaskets, heater cores, blocks, heads and freeze plugs. It contains an antifreeze-compatible sodium silicate liquid glass formula, so no draining of the cooling system is required. Not to mention, it will not harm the cooling system when used properly. The intake gasket seal you’ve been looking for is far more effective, easy to use, and less expensive than you’ve ever imagined. This is why Bar’s Leaks exists: To offer imminently usable, low-cost intake gasket seal and other products to auto owners who have no special experience or expertise.

You’ll find plenty of options when searching for products to fix an intake gasket leak. While our competition may claim to stop the leak quickly, their products don’t always perform as advertised and they sometimes make things worse. Their stop leak products can’t get your car back on the road like Bar’s Leaks — that’s why we’ve been the most trusted stop leak brand since 1947. Throughout our long history of serving car owners like you, we’ve used a team of dedicated chemical engineers to constantly develop and refine products that are safe, fast and effective in stopping intake gasket leaks and other automotive problems — including liquid copper and much more. Make sure to watch Bobby and Caitlin in our handy how-to video so you can become a “three-minute mechanic” and finally take control of that leak.

Stop Leaks, Save Money

When you’re experiencing mild to moderate leaks, including intake gasket leaks and leaks related to power steering, engine oil, cooling systems, transmission and other key systems, in your car’s operation, Bar’s Leaks has the power to stop those leaks quickly, effectively and affordably. As the best-known stop leak brand in America, we have a long history of creating products that even the novice auto owners can use to extend the lifespans of their vehicles and, best of all, save money by avoiding costly repairs. Our products are made in America, just an hour outside of Detroit. And we can look back at nearly 70 years of service and point to millions of customers who have used our products to their satisfaction. At Bar’s Leaks, you’ll find intake gasket seal in the form of liquid copper, plus other effective products, that fit perfectly into your lifestyle and budget.

Find where to get your Liquid Copper today.

Leave a Review

  • “I want to leave feedback... I used the Bar’'s Leaks Copper Block Seal on my 2000 Caddy STS. Before I used this stuff my car could only run for about a mile before it started to overheat. I tried a couple of other fixes, the ceramic, the fiber which both made you flush your cooling system before you even added the crap. Then I used your Copper Block Seal and it worked. I paid over $150 for a treatment of the ceramic stuff and it didn't do anything, the fiber ceramic didn't do anything either. They were both a waste of money. Your Bar’'s Leaks Liquid Copper Block Seal is the best s**t I have EVER used.”

    Michael M. - Columbus, OH
  • “Thank you, thank you, thank you! I do not have $1500 to repair my 1999 Venture van. Every story I read on the internet about the Chevy Ventures, was that even after having the intake manifold and head gaskets replaced, they still leaked anti-freeze either externally or internally. I just couldn't see spending $1500 on a van that has a book value of only $1200, but still, I needed transportation.

    One day I was in the automotive section of Walmart getting ready to buy another gallon of anti-freeze, when on the shelf right above was numerous kinds of Bar's Leaks products. I purchased the Bar's Liquid Copper Intake and Radiator sealant. At $8 each, I thought what the heck, buy two.

    I have to tell you it's the best $16 I've spent on that 1999 Van, even though I only used one bottle! At $16 for two bottles, it is a good alternative to repair a van, when the cost of repairs is more than the van's worth.

    I have 300 miles on the engine since I poured Bar's Leaks in, and everything is still normal.

    I am so impressed and thankful that I had to write and congratulate you on a great product. I also have to thank you for saving me so much money, and getting me out of a real spot that I could not get out of otherwise.

    Once again, thank you. If it is still running next year, I will write you back and tell you. Thank you.”

    J. P. Costanza - Virginia Beach, VA
  • “I've used Bar's Leak several times over the years, but you have so many products available now that I really didn't know what to use. Thank you for recommending Liquid Copper Block Seal for the intake manifold leak on our 1999 GMC. It seemed to work immediately and hasn't leaked a drop. Good products, good website and great advice. Thanks again for your help.”

    E. C. - Southern Windows & Doors
  • “I had a head gasket leak that was requiring me to replace about a gallon of coolant every 2 days. After using only 1/2 of a container of your Liquid Copper Block Seal [because disconnecting the return line to the radiator, I could only pour in that amount], the problem vanished. At some point I do need to repair the head gasket, but your product has bought me some valuable time.”

    P. B. - Sunnyvale, CA
  • “Hello, I used your product with great success the last nine months. After a blown head gasket, I applied your product and it immediately sealed the leaks. Just today after checking my radiator reservoir, I noticed some very small copper-looking particles floating on top. There seems to be no water in the oil and no white smoke form the tail pipe. The car is running good and not overheating.”

    G. K. - Columbia MO