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20 Best Water Pump Stop Leak (2023 Updated)

Water pump stop leak is a product that is used to help seal leaks in a water pump. This can help to extend the life of the water pump and prevent costly repairs.

20 Best Water Pump Stop Leak

Product Image Product Name Features Price

Bar's Leaks – 11 oz. Radiator Stop Leak

  • Works with any color antifreeze
  • Stops leaks and drips from wear and age
  • Harmless to rubber, aluminum & other metals

K Seal Heavy Duty Permanent Coolant Leak Sealer – 16 oz jug

  • Item Weight 544 g
  • Product Dimensions 15 x 10.4 x 4.8 cm
  • Item Weight 544 gm

Bar's Leaks Pelletized Radiator Stop Leak 11oz

  • Seals leaks
  • Conditions cooling system
  • Inhibits rust and corrosion

Bar's Leaks Liquid Aluminum Radiator Stop Leak 16.9oz

  • Safely Seals Leaks
  • Stops Overheating
  • Reduces Water Temperature

Liqui Moly 20132 – Radiator Stop Leak

  • LIQUI MOLY Radiator Stop-Leak completely seals such leaks immediately with ease.
  • Secures the combustion chamber from damages caused by coolant admission.

Bar's Leaks Radiator Stop Leak Tablets

  • Seals leaks
  • Conditions cooling system
  • Inhibits rust and corrosion

Bar's Leaks Block Seal Head Gasket Fix – 24 oz bottle

  • Safely seals gasket leaks
  • Quickly stops coolant leaks
  • Easy to use

K-Seal Permanent Leak Repair for Radiators, Head Gaskets, Blocks

  • 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

AlumaSeal ASBPI12 Radiator Stop Leak Powder Blister Card – 20 G

  • Inhibits rust
  • Lubricates water pump
  • Quick permanent seal

Bar's Leaks Cooling System Repair – 16.9 fl oz bottle

  • Scientifically Formulated To Stop Coolant Leaks, Thereby Reducing Antifreeze Loss
  • Cooling System Repair Stops Overheating And Reduces Water Temperature

K-Seal ST5501 Permanent Coolant Leak Repair – 8 oz bottle

  • No Flushing. Just shake, pour and go!
  • Mixes with all types of Antifreeze.
  • Multi Purpose ONe Step & Permanent.

Quikrete 10 lb Hydraulic Water-stop Cement

  • 10 lb

Liqui Moly Radiator Stop Leak 250ml

  • suitable for aluminum radiators.
  • permanently and reliably seals hairline cracks and small leaks.
  • no negative side effects on the water pump or heating circuit.

K-Seal Coolant Leak Repair, Head Gasket Sealant, Block Sealer, Radiator, Heater Core Stop Leak, ST5501

  • Advanced ceramic forumla Product Features: Anyone can use this product.
  • No Flushing or Draining.
  • You can even pour into the overflow tank. Mixes w/all types of antifreeze Just shake, pour & go.

American Granby FAL32 32 oz Fix-A-Leak Bottle

  • is a blended concentrated material designed to seal leaks in virtually any material.
  • can be applied for leaks in the shell and works equally well in plumbing.

CRC – 401214×6 – K&W Instant Cooling System Stop Lea

  • ItemNumber#C28401214X6
  • Using Nanotechnology, This Product Fills In Cracks And Crevices Other Products Can’t, Making A Stronger, More Solid Bond Than Competitors’ Products

Wynn's 1831004 45641 Cooling System Stop Leak 325 ml

  • Value for money
  • Safely packed
  • High quality

ATP AT-205 Re-Seal Stops Leaks, 8oz

  • About the product
  • Professional strength fast acting resealer, stops leaks fast
  • Rejuivinates all rubber seals gaskets in engines, transmissions, power steering, differentials and hydraulic systems
Bar's Leaks – 11 oz. Radiator Stop Leak
  • Works with any color antifreeze
  • Stops leaks and drips from wear and age
  • Harmless to rubber, aluminum & other metals
K Seal Heavy Duty Permanent Coolant Leak Sealer – 16 oz jug
  • Item Weight 544 g
  • Product Dimensions 15 x 10.4 x 4.8 cm
  • Item Weight 544 gm
Bar's Leaks Pelletized Radiator Stop Leak 11oz
  • Seals leaks
  • Conditions cooling system
  • Inhibits rust and corrosion
Bar's Leaks Liquid Aluminum Radiator Stop Leak 16.9oz
  • Safely Seals Leaks
  • Stops Overheating
  • Reduces Water Temperature
Liqui Moly 20132 – Radiator Stop Leak
  • LIQUI MOLY Radiator Stop-Leak completely seals such leaks immediately with ease.
  • Secures the combustion chamber from damages caused by coolant admission.
Bar's Leaks Radiator Stop Leak Tablets
  • Seals leaks
  • Conditions cooling system
  • Inhibits rust and corrosion
Bar's Leaks Block Seal Head Gasket Fix – 24 oz bottle
  • Safely seals gasket leaks
  • Quickly stops coolant leaks
  • Easy to use
K-Seal Permanent Leak Repair for Radiators, Head Gaskets, Blocks
  • 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
AlumaSeal ASBPI12 Radiator Stop Leak Powder Blister Card – 20 G
  • Inhibits rust
  • Lubricates water pump
  • Quick permanent seal
Bar's Leaks Cooling System Repair – 16.9 fl oz bottle
  • Scientifically Formulated To Stop Coolant Leaks, Thereby Reducing Antifreeze Loss
  • Cooling System Repair Stops Overheating And Reduces Water Temperature
K-Seal ST5501 Permanent Coolant Leak Repair – 8 oz bottle
  • No Flushing. Just shake, pour and go!
  • Mixes with all types of Antifreeze.
  • Multi Purpose ONe Step & Permanent.
Quikrete 10 lb Hydraulic Water-stop Cement
  • 10 lb
Liqui Moly Radiator Stop Leak 250ml
  • suitable for aluminum radiators.
  • permanently and reliably seals hairline cracks and small leaks.
  • no negative side effects on the water pump or heating circuit.
K-Seal Coolant Leak Repair, Head Gasket Sealant, Block Sealer, Radiator, Heater Core Stop Leak, ST5501
  • Advanced ceramic forumla Product Features: Anyone can use this product.
  • No Flushing or Draining.
  • You can even pour into the overflow tank. Mixes w/all types of antifreeze Just shake, pour & go.
American Granby FAL32 32 oz Fix-A-Leak Bottle
  • is a blended concentrated material designed to seal leaks in virtually any material.
  • can be applied for leaks in the shell and works equally well in plumbing.
CRC – 401214×6 – K&W Instant Cooling System Stop Lea
  • ItemNumber#C28401214X6
  • Using Nanotechnology, This Product Fills In Cracks And Crevices Other Products Can’t, Making A Stronger, More Solid Bond Than Competitors’ Products
Wynn's 1831004 45641 Cooling System Stop Leak 325 ml
  • Value for money
  • Safely packed
  • High quality
ATP AT-205 Re-Seal Stops Leaks, 8oz
  • About the product
  • Professional strength fast acting resealer, stops leaks fast
  • Rejuivinates all rubber seals gaskets in engines, transmissions, power steering, differentials and hydraulic systems

1. Bar’s Leaks – 11 oz. Radiator Stop Leak

Bar's Leaks - 11 oz. Radiator Stop Leak

  • Works with any color antifreeze
  • Stops leaks and drips from wear and age
  • Harmless to rubber, aluminum & other metals

Check Latest Price

Sold By Price
Amazon.com – Seller
Walmart
AutoZone
Ace Hardware

Product Details

Specifications

Details
Product Type Stop Leak Concentrate
Container Size 11 oz
Brand Name Bar’s Leaks

Reviews From Real Customers

Kurt P
oguz1
foster

2. K Seal Heavy Duty Permanent Coolant Leak Sealer – 16 oz jug

K Seal Heavy Duty Permanent Coolant Leak Sealer - 16 oz jug

  • Item Weight 544 g
  • Product Dimensions 15 x 10.4 x 4.8 cm
  • Item Weight 544 gm

Check Latest Price

Sold By Price
Amazon.com
eBay
Walmart
JBTools.com

Product Details

Specifications

Details
Product Dimensions 5.9 x 4.1 x 1.9 inches
Country of Origin USA
Is Discontinued By Manufacturer No

Reviews From Real Customers

H.G.R.
D.B.P.
K.

3. Bar’s Leaks Pelletized Radiator Stop Leak 11oz

Bar's Leaks Pelletized Radiator Stop Leak 11oz

  • Seals leaks
  • Conditions cooling system
  • Inhibits rust and corrosion
  • Lubricates water pump seals
  • Helps control electrolysis

Check Latest Price

Sold By Price
Amazon.com
eBay
Walmart
AutoZone

Product Details

Specifications

Details
Item has MSDS (SDS)? Y
Special Instructions Use 1 bottle for 6, 8 and 10 cylinder gas or diesel engines. For 4 cylinder engines, use 1/2 of liquid and pellets. One bottle treats systems up to 4 gallons.
Package Weight 11
Package Weight UOM OZ
Package Size 11 oz

Reviews From Real Customers

Guy
2015-steif
JoeCLEAN

4. Bar’s Leaks Liquid Aluminum Radiator Stop Leak 16.9oz

Bar's Leaks Liquid Aluminum Radiator Stop Leak 16.9oz

  • Safely Seals Leaks
  • Stops Overheating
  • Reduces Water Temperature

Check Latest Price

Sold By Price
Amazon.com
Walmart
AutoZone
Ace Hardware

Product Details

Specifications

Details
Excluded Ship States No
Item has MSDS (SDS)? Y
Special Instructions Use 1/2 (half) bottle in a small cooling system, such as 4 cylinders with no A/C. Use 1 (one) bottle for regular size systems, most 4, 6, 8 and 10 cylinder engines.
Item is Shipped at this Packaging Level N
Information Effective Date 2011-06-27 12:00:00

Reviews From Real Customers

Precioso
Watterson

5. Liqui Moly 20132 – Radiator Stop Leak

Liqui Moly 20132 - Radiator Stop Leak

  • LIQUI MOLY Radiator Stop-Leak completely seals such leaks immediately with ease.
  • Secures the combustion chamber from damages caused by coolant admission.
  • For all cooling water and heating systems with and without water filters.

Check Latest Price

Sold By Price
Amazon.com – Seller
ECS Tuning
FCP Euro
Turner Motorsport

Product Details

Specifications

Details
Length 6.5 in
Height 2.5 in
Width 2.5 in
Weight 0.7 lb

Reviews From Real Customers

Br3adpan
fcpeuro.com
finglonga

6. Bar’s Leaks Radiator Stop Leak Tablets

Bar's Leaks Radiator Stop Leak Tablets

  • Seals leaks
  • Conditions cooling system
  • Inhibits rust and corrosion
  • Lubricates water pump seals
  • Helps control electrolysis

Check Latest Price

Sold By Price
Amazon.com – Seller
eBay
NAPA Auto Parts
Advance Auto Parts

Product Details

Reviews From Real Customers

Mark W.
TahoeJoe

7. Bar’s Leaks Block Seal Head Gasket Fix – 24 oz bottle

Bar's Leaks Block Seal Head Gasket Fix - 24 oz bottle

  • Safely seals gasket leaks
  • Quickly stops coolant leaks
  • Easy to use
  • Pour directly into radiator
  • No draining required

Check Latest Price

Sold By Price
Amazon.com
eBay
Walmart
AutoZone

Product Details

Specifications

Details
Item has MSDS (SDS)? Y
Special Instructions 1 to 1.5 gallons cooling capacity use 1/2 bottle. 1.5 gallon to 4 gallon cooling capacity use 1 bottle. Larger systems use 1 bottle for every 4 gallons of coolant capacity.
Package Weight 1.6
Package Weight UOM LB
Net Packaged Quantity 1 BO

Reviews From Real Customers

Starchild
Prius Issues
Mdadio

8. K-Seal Permanent Leak Repair for Radiators, Head Gaskets, Blocks

K-Seal Permanent Leak Repair for Radiators, Head Gaskets, Blocks

  • 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
  • Just shake, pour and go

Check Latest Price

Sold By Price
Amazon.com

Product Details

Specifications

Details
Product Dimensions 7.87 x 2 x 6 inches
Country of Origin USA
Is Discontinued By Manufacturer No

Reviews From Real Customers

Chato
Timo
supercheapauto.com.au

9. AlumaSeal ASBPI12 Radiator Stop Leak Powder Blister Card – 20 G

AlumaSeal ASBPI12 Radiator Stop Leak Powder Blister Card - 20 G

  • Inhibits rust
  • Lubricates water pump
  • Quick permanent seal
  • Compatible w/all antifreeze including extended life coolants
  • Will not clog cooling systems

Check Latest Price

Sold By Price
Amazon
Ace Hardware
Advance Auto Parts
Long Beach Ace Hardware

Product Details

Specifications

Details
Recommended Surface Type Aluminum
Container Size 0.7 oz
Brand Name AlumAseal
Product Type Stop Leak Radiator Sealer

Reviews From Real Customers

Pablo
Advance Auto Parts
Nodrog

10. AlumaSeal Radiator Stop Leak and Conditioner Liquid (16 fl. oz.)

AlumaSeal Radiator Stop Leak and Conditioner Liquid (16 fl. oz.)

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Sold By Price
Amazon
eBay – mysaver

Product Details

Reviews From Real Customers

gianna
Shaggy

11. Bar’s Leaks Cooling System Repair – 16.9 fl oz bottle

Bar's Leaks Cooling System Repair - 16.9 fl oz bottle

  • Scientifically Formulated To Stop Coolant Leaks, Thereby Reducing Antifreeze Loss
  • Cooling System Repair Stops Overheating And Reduces Water Temperature
  • Works With Any Color Antifreeze
  • Reinforced With Carbon Fiber

Check Latest Price

Sold By Price
Amazon
Walmart
AutoZone
NAPA Auto Parts

Product Details

Specifications

Details
Size 1 Pack

Reviews From Real Customers

Snobordnut
Nikkolas
TonyaMac

12. K-Seal ST5501 Permanent Coolant Leak Repair – 8 oz bottle

K-Seal ST5501 Permanent Coolant Leak Repair - 8 oz bottle

  • No Flushing. Just shake, pour and go!
  • Mixes with all types of Antifreeze.
  • Multi Purpose ONe Step & Permanent.

Check Latest Price

Sold By Price
Amazon
eBay
Agri Supply
ToolTopia.com

Product Details

Specifications

Details
Units in Package 1
Unit Size 8 oz

Reviews From Real Customers

Martin
C.J.
Sirstylish

13. Quikrete 10 lb Hydraulic Water-stop Cement

Quikrete 10 lb Hydraulic Water-stop Cement

  • 10 lb

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Sold By Price
Amazon
Home Depot
Lowe’s
Ace Hardware

Product Details

Specifications

Details
Package Size 10 lb
Indoor or Outdoor Indoor and Outdoor
Set Time 5 min
Product Type Hydraulic Water Stop Cement
Brand Name Quikrete

Reviews From Real Customers

IVIK
Pat P
jonwoh

14. Liqui Moly Radiator Stop Leak 250ml

Liqui Moly Radiator Stop Leak 250ml

  • suitable for aluminum radiators.
  • permanently and reliably seals hairline cracks and small leaks.
  • no negative side effects on the water pump or heating circuit.
  • for preventive use For all cooling water and heating systems with and without water filters.

Check Latest Price

Sold By Price
Amazon
MicksGarage.com

Product Details

Reviews From Real Customers

2trippers
malco-birc

15. K-Seal Coolant Leak Repair, Head Gasket Sealant, Block Sealer, Radiator, Heater Core Stop Leak, ST5501

K-Seal Coolant Leak Repair, Head Gasket Sealant, Block Sealer, Radiator, Heater Core Stop Leak, ST5501

  • Advanced ceramic forumla Product Features: Anyone can use this product.
  • No Flushing or Draining.
  • You can even pour into the overflow tank. Mixes w/all types of antifreeze Just shake, pour & go.
  • Works in just minutes Works on Head Gaskets, Radiator, Heater Cores, Freeze Plugs, Water Pump Casings, Cylinder Heads & Cracked Blocks.

Check Latest Price

Sold By Price
Amazon
eBay
Walmart
NAPA Auto Parts

Product Details

16. American Granby FAL32 32 oz Fix-A-Leak Bottle

American Granby FAL32 32 oz Fix-A-Leak Bottle

  • is a blended concentrated material designed to seal leaks in virtually any material.
  • can be applied for leaks in the shell and works equally well in plumbing.
  • will seal holes 1/8 in diameter.
  • will form a long lasting seal.
  • use 1 quart per pool up to 22.000gallons.

Check Latest Price

Sold By Price
Amazon
BestPoolShop.com
Pool and Spa Supply Store
OneSourcePool

Product Details

Reviews From Real Customers

dallagif-0
dpfent65
curtisautumn13

17. CRC – 401214×6 – K&W Instant Cooling System Stop Lea

CRC - 401214x6 - K&W Instant Cooling System Stop Lea

  • ItemNumber#C28401214X6
  • Using Nanotechnology, This Product Fills In Cracks And Crevices Other Products Can’t, Making A Stronger, More Solid Bond Than Competitors’ Products
  • Compatible With All Types Of Anti-Freeze

Check Latest Price

Sold By Price
Amazon
eBay
Walmart
AutoZone

Product Details

Specifications

Details
Appearance Lumpy Copper Liquid
Odor Mild
Container Size 15 fl oz (US)
Acts as Stop Leak No
SDS Required Yes

Reviews From Real Customers

Autologous1
Cuso
Rodger76

18. Wynn’s 1831004 45641 Cooling System Stop Leak 325 ml

Wynn's 1831004 45641 Cooling System Stop Leak 325 ml

  • Value for money
  • Safely packed
  • High quality
  • Range always up-to-date

Check Latest Price

Sold By Price
Amazon
eBay – mongrossisteauto

Product Details

Reviews From Real Customers

mw1043
egon1311
Bronsgeest

19. K-Seal ST5501 Multi Purpose One Step Permanent Coolant Leak Repair, Blue

K-Seal ST5501 Multi Purpose One Step Permanent Coolant Leak Repair, Blue

Check Latest Price

Sold By Price
Amazon
Walmart

Product Details

20. ATP AT-205 Re-Seal Stops Leaks, 8oz

ATP AT-205 Re-Seal Stops Leaks, 8oz

  • About the product
  • Professional strength fast acting resealer, stops leaks fast
  • Rejuivinates all rubber seals gaskets in engines, transmissions, power steering, differentials and hydraulic systems
  • Compatible with conventional and synthetic oils, ATF, gear oil, power steering fluids and hydraulic oil
  • Does not contain petroleum distillates, will not over-swell or breakdown seals

Check Latest Price

Sold By Price
eBay
Walmart
Advance Auto Parts
CARiD.com

Product Details

Reviews From Real Customers

ANTHONY
migKab

Conclusion

The water pump stop leak is a great way to quickly and easily fix a water pump. It is easy to use and does not require any special tools or skills. Simply follow the directions on the package and you will be able to fix your water pump in no time.

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