Radiator & Cooling System Products

Radiator Stop Leak

Quickly Stops Leaks in the Radiator and Cooling System to Avoid Costly Repairs.

The Problem

The loss of coolant from the radiator, engine blocks, cylinder heads, and heater cores can cause the engine to over-heat , which can create serious damage and result in very expensive repairs.

The Solution

BARDAHL Radiator Stop Leak is an easy to use chemical solution that safely and quickly repairs minor leaks in radiators, engine blocks, cylinder heads, and heater cores.


  • Seals minor leaks in the radiator and cooling system
  • Safe to use and will not harm metal, rubber or plastic parts
  • Compatible with all rust inhibitors, coolant types and anti-freeze solutions



Open radiator cap when engine is cool. Start engine, when it reaches operating temperature, shake bottle and pour into radiator. Do not use more than 3 oz. per gal. of cooling system capacity. If needed, add coolant/anti-freeze so level is above radiator core. Replace cap.

Product Specifications

  • Product & Size
    8118 - 16.9 oz (500 ml)
  • Case Qty/Wt
    6 / 7.5 lbs
  • UPC Code
    0 76906 08118 4
  • Downloads

    Bardahl Manufacturing Corporation

    P.O. Box 70607 Seattle, Washington  98127
    1400 N.W. 52nd Street, Seattle, Washington  98107

    Phone: (888) 227-3245
    Fax: (206) 784-3219
    Customer Service: (888) 227-3245

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