Product Features
- Brand: Bars Leaks
- Radiator Stop Leak Concentrate
- Size: 11 oz
- Seals Leaks in Radiators, Gaskets, Heater Core & Freeze Plugs
- Works with ALL types and colors of antifreeze coolant and/or water. One bottle treats systems up to 4 gallons.
ACDelco GM Original Equipment 10-108 Cooling System Sealing Tabs - 4 g (Pack of 5)

693 ratings
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Product Features
- Engineered for use on a variety of engine components - effective on: oil pan, ladder frame, front and rear covers, t-joints, manifold corners, intake, manifold end seals, and cam covers
- Designed for quick and easy application, assembly may be filled with oil or coolant immediately after applying sealant and torqueing the bolts
- High viscosity product that cures when exposed to air
Product Features
- Bar's Leaks Liquid Aluminum Stop Leak seals radiator leaks. Seals freeze plug leaks. Repairs gasket leaks and heater core leaks. Lowers water temperature.
- Seals radiator leaks
- Seals freeze plug leaks
- Repairs gasket leaks
K-Seal ST5501 Multi Purpose One Step Permanent Coolant Leak Repair

10036 ratings
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Product Features
- Permanent Coolant Leak Repair - Just Shake, Pour And Go.Fit Type: Universal
- Mixes With All Antifreeze
- No Draining Or Flushing
- Fixes Cracks And Leaks In Radiator, Head Gasket, Freeze Plugs, Cylinder Heads, Heater Core, Water Pump Casing And Engine Blocks
Product Features
- Bar's Leaks Liquid Aluminum Stop Leak seals radiator leaks. Seals freeze plug leaks. Repairs gasket leaks and heater core leaks. Lowers water temperature.
- Seals radiator leaks
- Seals freeze plug leaks
- Repairs gasket leaks
- Special Shipping Information: This item cannot be returned and has additional shipping restrictions
- TIP: If direct access to radiator is not available, install in overflow tank. All products are safe to use per the directions, proper dosage and in a clean system.
K-Seal ST5516 HD Multi Purpose One Step Permanent Coolant Leak Repair

1227 ratings
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Product Features
- Permanent coolant leak repair - Just shake, pour and go
- Mixes with all antifreeze
- No draining or flushing
- Fixes cracks and leaks in radiator, head gasket, freeze plugs, cylinder heads, heater core, water pump casing and engine blocks
- If product did not seal head gasket leak, the system might be Over-pressurized, which causes back pressure and doesn't allow the product to reach the problem area, on this page below under Technical Specification is a PDF Guide with instructions to follow to complete the repair successfully
Bar's Leaks 1109 Block Seal Liquid Copper Intake and Radiator Stop Leak - 18 oz.

957 ratings
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7
Product Features
- Seals larger leaks seals
- Repairs heater core leaks
- Repairs freeze plug leaks
- Repairs blown head gaskets
- Repairs blocks
Product Features
- Works with all types and colors of anti-freeze coolant
- Stops and seals coolant leaks
- One bottle treats up to 4 gallons
- Works with all types and colors of anti-freeze coolant
- Stops and seals coolant leaks
- One bottle treats up to 4 gallons
Product Features
- Stops Cooling System Leaks
- Compatible with all brands of anti-freeze including conventional green or blue and extended life red/orange or yellow (OAT/HOAT) coolant
- Premium Carbon Fiber Formulation For Extended Protection
- Stops cooling system leaks
LEAK SAVER Direct Inject AC Refrigerant Leak Sealant - for Most HVAC Systems Up to 5 Tons - Professional AC Leak Sealer - AC Stop Leak Updated 2023 Formula - Works with All Systems & Refrigerants

1866 ratings
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Product Features
- STOP LEAKS PERMANENTLY - The Leak Saver can permanently seal small refrigerant leaks where the complete refrigerant charge is not lost within 7 days. When a leak occurs, the Leak Saver reacts with the air and moisture at the leak site to permanently seal the leak. When used for preventative maintenance, the active ingredient circulates safely in the system to seal future leaks
- WORKS WITH ALL SYSTEMS INCLUDING CARS - Our product is compatible with all systems, refrigerants (except ammonia), and oils. It is great for central air conditioners, car refrigerant and automotive air conditioners, refrigerators, ductless mini-splits, heat pumps, geothermal heat pumps, commercial refrigeration systems, micro channel coils and more. It also works with all refrigerants including R410A Freon, R22 and replacements, R134A , r1234yf, R404A, R290, R600a, and more
- STRAIGHTFORWARD INSTALLATION - No more fussing with messy syringes, hoses, or pressurized cans. The Leak Saver HVAC sealant injects directly and easily into the system with a basic manifold gauge set or even easier with our Leak Shot Injection Kits. NOTE: for automotive systems, you will still need the standard 134A to 1/4” charging adapter. Mini-splits may require a 5/16” to 1/4” charging adapter. You can see our straightforward installation videos below
- SAFE FOR ALL TOOLS AND PARTS - Our HVAC leak sealer is safe for all manifold gauges, hoses, expansion valves (TXVs, TEVs, capillary tubes, etc), Schrader valves, and anything needed to service your system. Adapter required for mini splits (5/16" to 1/4") and automotive systems ( 134A to 1/4")
- LEAK SAVER Direct Inject AC Refrigerant Leak Sealant - For Most HVAC Systems Up To 5 Tons - Professional AC Leak Sealer - AC Stop Leak Updated 2023 Formula - Works With All Systems & Refrigerants