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30% Off Online Orders of Select Parts and Accessories
Receive 30% Off Your Online Purchase. Use promotional code MANNY30 at checkout to receive discount. Not valid in combination with any other discounts or promotions. Not valid on gift cards, special orders, installed merchandise, commercial or fleet purchases. Excludes the following categories: Tires, Wheels, Batteries, Powerstop Brake Kits, Oil, Antifreeze, Refrigerant, Truck Boxes, Vent Visors, Bug Shields and BRANDS: Razor, Traxxas, Superchips, Hypertech, Edge, Bully Dog, Diablo, Edelbrock, Holley, NOS, Proform, Specialty Auto, Thule, Autometer, Accel, K&N, Kenwood, Pioneer, Sony, JVC, MSD and BBK Performance. Valid online until 2:59 am EST on 7/28/16. Online orders scheduled for in-store pick up must be completed by closing on 7/27/16 for discount to apply.

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Showing  Bar's Leaks Block Seal, Intake and Radiator Stop Leak 
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Bar's Leaks Block Seal, Intake and Radiator Stop Leak

Part # 1109   SKU: 11226
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$9.49 / ea
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Bar's Leaks Block Seal, Intake and Radiator Stop Leak

If you're having issues with larger cooling system leaks, Bar's Leaks Liquid Copper Block Seal Intake and Radiator Stop Leak can help. The one step formula seals and permanently repairs larger leaks.
  • Permanently repairs leaks in gaskets, radiators, heater cores, intake manifolds, blocks, heads, and freeze plugs
  • Contains advanced microscopic stop leak fibers, which lock together to increase strength and promote a permanent seal, but will not clog your engine components
  • Ideal for use on cars, trucks, vans, SUVs and RVs
  • Contains an antifreeze compatible sodium silicate liquid glass formula, so no draining of the cooling system is required
  • Bar's Leaks Liquid Copper Block Seal Intake and Radiator Stop Leak will not harm the cooling system when used according to directions
  • Compatible with conventional green (silicate-based) and extended life red/orange or yellow (OAT) antifreeze
  • Seals larger leaks regular stop leaks won't
  • To keep your car running smoothly, check out our wide selection of trusted Bar's Leaks repair solutions and Rislone performance enhancement products
  • The Pep Boys Say: "Bar's Leaks Liquid Copper is the top-of-the line cooling system stop leak, designed for larger problems regular stop leaks won't fix."


Rated 3.3 out of 5 by 4 reviewers.
Rated 5 out of 5 by Bar's Leak Block Seal works This sealed a crack in a head on a 2000 Expedition 5.4L that was mixing coolant and oil into oil pan and coolant overflow bottle. Also used on a 2003 F-150 4.6L that was losing coolant into exhaust. Both repairs were in July 2015 and are running perfect, F-150 just back from Laughlin. Thanks! September 4, 2015
Rated 2 out of 5 by Hasn't stopped the leak Easy to use, but has not stopped the leak August 6, 2015
Rated 5 out of 5 by Saved the day Had a Jeep with a leaking freeze plug. Plug was in the worst place to reach and was going to require some major effort to change. Decided to try this product and leak stopped in minutes. Great product for emergencies or when changing leaking part is not an immediate option. Still holding strong. January 16, 2015
Rated 1 out of 5 by Clogged my entire cooling system! This is my first bad review of a product in 32 years. Had a small leak in my truck. Was in a pinch because of the holiday season. Figure use this product and I can then fix the small leak later. One use and one week later my entire cooling system was clogged up. Spent an additional $817 to flush the truck out and replace the radiator. Please do not buy this product. January 3, 2015
  • 2016-07-23 T09:44:03.575-05:00
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