Bar’s Leaks 1109 Block Seal Liquid Copper Intake and Radiator Stop Leak – 18 oz. (4 Pack)

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  • VIDEO: How to Install Bar's Leaks Liquid Copper Block Seal (p/n 1109)
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  • Bar's stop leak works!
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  • 1 Month and 100’s of miles AFTER Does Stop Leak really Work? Testing the Top Rated Coolant leak Fix!
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  • Bar's stop leak danger!
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Amazon Price: $37.37 (as of November 13, 2025 1:35 am – Details). Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on the Amazon site at the time of purchase will apply to the purchase of this product.
  • Brand: Bar’s Leaks
  • Manufacturer: Bar’s Products

Features

  • PERMANENTLY FIXES COOLING SYSTEM LEAKS: . One step formula permanently repairs coolant loss problems on cars, trucks, vans, SUV’s and RV’s.
  • ANTIFREEZE COMPATIBLE – NO DRAINING REQUIRED: Antifreeze compatible sodium silicate liquid glass penetrates large and small leaks in plastic, aluminum and cast iron heads, blocks, intake manifold & gaskets, freeze plugs, heater cores and radiators.
  • ONE STEP – POUR DIRECTLY INTO RADIATOR – EASY TO USE: Fiber additives lock together with liquid to increase strength and promote a permanent seal. It will not harm the coolingsystem when used properly, no draining is required.
  • USE WITH ALL TYPES OF TRADITIONAL OR EXTENDED LIFE COOLANT: Use with ALL types of traditional or extended life coolant including yellow, orange, pink, red, blue, purple and green silicate based & non-silicate based (OAT/HOAT) 50-50 mix antifreeze, and/or water.

Manufacturer Info

  • PartNumber: 1109-4PK
  • Model: 1109-4PK
  • Warranty: Please see manufacturer

Product Info

  • NumberOfItems: 4

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