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25% Off Online Orders of Select Hard Parts. Enter Promo Code MMJ30 in Cart.

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25% Off Select Parts and Accessories
Receive 25% Off Your Online or In-Store Purchase. Use promotional code MMJ25 at checkout to receive discount. Not valid in combination with any other discounts, promotions or items already on sale. Not valid on gift cards, special orders, installed merchandise, commercial or fleet purchases. Those products that are included will be displayed in product search results and product detail pages. INCLUDES the following categories: Starters, Alternators, Fuel Pumps, Radiators, Shocks & Struts, Chassis, CV Axles, Batteries, Ignition, Window Motors, Wipers, Appearance Chemicals, Car Wash Accessories, Floor Mats, Lift Equipment, Hand Tools, Headlamps and Bulbs. Excludes the following brands: Powerstop, Razor, Traxxas, Superchips, Hypertech, Edge, Bully Dog, Diablo, Edelbrock, Holley, NOS, Proform, Specialty Auto, Autometer, Accel, K&N, Kenwood, Pioneer, Sony, Thule, Thule Karrite, JVC, Flowmaster, Hurst, B&M, MSD, Moog, Wagner and BBK Performance. Valid online until 2:59 am EST on 5/1/17.

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  • Part #: PLT11|
  • SKU: 9284432

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    • Inhibits rust and corrosion
    • Lubricates water pump seal
PayPal available for online purchases. Major credit cards accepted online and in store. Pay online, in-store or take advantage of our Pep Boys credit card. Learn more and see additional details in cart.

Bar's Leaks Pelletized Heavy Duty Stop Leak

Bar's Leaks Original Rhizex Pelletized Formula Heavy Duty Stop Leak seals internal, external, and coolant-to-oil leaks. It is specially formulated to seal larger leaks better than other stop leak products.
  • Inhibits rust and corrosion
  • Lubricates water pump seal
  • Protects the entire cooling system and stops current and future leaks
  • Helps control electrolysis
  • Great for use on cars, trucks, vans, SUVs and RVs
  • Rhizex pellets dissolve in minutes to seal radiator and other cooling system leaks
  • Compatible with conventional green (silicate-based) and extended life red/orange or yellow (OAT) antifreeze
  • 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: "Pelletized Heavy Duty Stop Leak is the top of the line coolant-to-oil stop leak."


Bar's Leaks Pelletized Heavy Duty Stop Leak is rated 4.0 out of 5 by 5.
Rated 3 out of 5 by from Cheapest product on shelf, Magic in a bottle, follow the directions on bottle. I have a 2008 F150 and need a intake manifold gasket and don't have the time or money to replace it, so About 3 months ago my truck was misfiring from cylinder. I replaced all spark plugs and found antifreeze in cylinder 5 & 6 sh## that's a head gasket. That's going to cost some money; after doing a lot of research online a lot of ford owner complained about intake manifold leaking under the thermostat housing, one guy tried this stuff it can't hurt so I called a good friend of mine and described everything and tod him about bars leak stop and he said ok but follow the instructions to the letter. Man I got to Pepboys their was price from 3.00 to 50.00 I went back online spent about 40 minutes looking at reviews this one had ok reviews I grabbed 2 bottles. I drained the radiator I don't have a radiator cap so as instructions say took the top hose off installed "liquid product only" I had to delude the pellets in hot water over 5 times like I said don't install the pellets it will clog your heater core and other things. Put everything together started truck "skeptic" and I freaked out for the first half hour I had no head and and thought I blocked heater core then whatever it was broke free and I had heat so I think I poured some pellets. 2 months later stil leak free only used one bottle, other bottle I will save just in case.
Date published: 2015-10-11
Rated 5 out of 5 by from 95 Toyoto head gasket leak Great product, stopped leak 1year & counting. Did not have to drain , just add and drive.
Date published: 2015-06-01
Rated 5 out of 5 by from product works well! product works well
Date published: 2014-12-04
Rated 2 out of 5 by from Meh Didn't do the trick on a small leak
Date published: 2014-11-15
Rated 5 out of 5 by from This product worked very well for me This is great stuff when I used it all leaks disappeared.
Date published: 2014-11-04
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