Frequently Asked Questions

Pelletized Heavy Duty Stop Leak (p/n PLT11)

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Can Bar’s Leaks be installed in existing antifreeze?

Yes, this product is specifically designed to be directly added to the cooling system with out having to flush out the antifreeze.

Will Bar’s Leaks work in the new extended life antifreeze?

Yes, Bar’s Leaks is compatible with both conventional green (silicate-based) and extended life red/orange or yellow (OAT) antifreeze.

How does Bar’s Leaks work?

Bar’s Leaks will seal external, internal and coolant to oil leaks. Once installed, the Bar’s Leaks particles shrink up to 15 percent. On an external leak, the tiny particles flow to the point of the leak. They then collect at the outside of the seepage and build inward. Internal leaks, the Bars Leaks particles will burn when subjected to the 5000 degree heat of the combustion chamber to seal head gasket seepage and small cracks. On coolant to oil leaks, where coolant can seep into the crankcase contaminating the oil, the tiny Bar’s Leaks particles will seal the pores in cast iron and aluminum preventing seepage.

How long does it take for the Bar’s Leaks to work?

We recommend you drive/idle vehicle for 15 to 20 minutes. In most cases the leak will be sealed with in this amount of time. If the leak is not sealed, a second application maybe required.

Will Bar’s Leaks plug my heater core?

No, the tiny particles will pass through a 24-gauge mesh screen which is the spec for the BIG 3 car/truck manufacturers. They say that any product installed in the cooling system must pass through this screen. Bar’s Leaks is the only stop leak to pass this test and to be approved by the vehicle manufacturers.
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.

How do I pre-dissolve pellets?

Add contents of bottle to warm tap water. NOTE: Never place product in microwave, do not boil product in pan on stove.

What are the dosage recommendations?

Use 1 bottle for 6, 8 and 10 cylinder gas or diesel engines. For 4 and 5 cylinder engines, use ½ of liquid and pellets. One bottle treats systems up to 4 gallons.

I accidentally added the Bar’s Leaks Pelletized Stop Leak into my gas tank, what should I do?

Bar’s Leaks Pelletized Stop Leak is only designed to be added to the cooling system. If the product is installed in the gas tank, the tank should be removed and cleaned out by a professional mechanic.

I accidentally added the Bar’s Leaks Pelletized Stop Leak into my engine oil, what should I do?

Bar’s Leaks Pelletized Stop Leak is only designed to be added to the cooling system. If the product is installed in the engine oil and the engine has not been started, in many cases you can remove the valve cover and drain the oil leaving the drain plug off. Then use an engine flush washing out the head keeping 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, you need to take the vehicle to have a professional mechanic evaluate what can be done to clean the inside of the engine. This might include taking the engine apart to clean all of the parts.

I accidently added the Bar’s Leaks / Rislone Radiator Heavy Duty Stop Leak to my overflow / reservoir what should I do?

It is our recommendation to drain and flush the overflow / reservoir then install the product directly into the radiator.