Stop Leak

Explore our selection of Stop Leak. Find quality products, compare options, and get fast shipping on the items you need.

Stop Leak

More than 50 products

ToolSource offers 54 stop leak products, ranging from $0 to $1115.86, for automotive and industrial applications.

About Stop Leak

Our Stop Leak category addresses a wide range of fluid leaks, from engine coolant and radiators to transmissions and power steering systems. We stock solutions from trusted brands like Bar's Leaks - Rislone, known for their comprehensive line of sealants, including popular products like Bar's Leaks Transmission Stop Leak and Bar's Radiator Stop Leak Tablets. Whether you're looking for the best radiator stop leak or a specific solution like Bar's Stop Leak Water Pump, we have options to suit your needs.

We also carry specialized products from FJC, Radiator Specialty Company, and Uview, ensuring you have access to a variety of formulations and application methods. For more demanding repairs, consider Absolute Coatings (POR15) for robust sealing solutions or S.U.R. and R Auto Parts for specialized fittings and sealants. Additionally, we offer products from 3M Mar-Hyde and Alemite, providing a comprehensive selection to tackle any leak, big or small. Finding the best engine coolant stop leak or addressing a transmission leak is easier with our diverse inventory.

Frequently Asked Questions

ToolSource offers a wide selection of Stop Leak with over 54 products from leading industrial brands. Top brands include FJC, Radiator Specialty Company, Uview, Bar's Leaks - Rislone.

Consider the specific application, required specifications, and brand preference. Our product listings include detailed specifications to help you find the right fit.

ToolSource offers free shipping on orders over $99. Check individual product pages for specific shipping details and availability.
Displaying 1 to 36 (of 93 products)
(image for) S.U.R. and R Auto Parts

(image for) 3/8" Fluid Line Stopper (1)

3/8" Fluid Line Stopper (1)
S.U.R. and R Auto Parts FLS38

Your Price: $9.92
(image for) POR 15

(image for) 49216 Fuel Tank Sealer, 8 oz Can, Semi-Transparent Silver, 2

49216 Fuel Tank Sealer, 8 oz Can, Semi-Transparent Silver, 2
POR 15 49216

Your Price: $20.02
List Price: $20.31
1% off
(image for) Justrite

(image for) 5 GALL YELLOW SAFETY CAN

5 GALL YELLOW SAFETY CAN
Justrite 7250230

Your Price: $168.45
(image for) S.U.R. and R Auto Parts

(image for) 5/16" Fluid Line Stopper (1)

5/16" Fluid Line Stopper (1)
S.U.R. and R Auto Parts FLS516

Your Price: $9.92
(image for) Uview

(image for) AC EXTENDYE BTL .25OZ/7.5ML

AC EXTENDYE BTL .25OZ/7.5ML
Uview B499012A

Your Price: $5.55
(image for) Mastercool

(image for) Auto Master Leak Shield Sealant

Auto Master Leak Shield Sealant
Mastercool 53615-A

Your Price: $41.67
List Price: $48.96
15% off
(image for) S.U.R. and R Auto Parts

(image for) Banjo Fluid Line Stopper FLSBAN for Auto Repairs

Banjo Fluid Line Stopper FLSBAN for Auto Repairs
S.U.R. and R Auto Parts FLSBAN

Your Price: $9.92
(image for) Tracer Products

(image for) Cool Seal A/C Leak Sealer

Cool Seal A/C Leak Sealer
Tracer Products TP-2210CS

Your Price: $50.13

(image for) CS/40 12oz. EQUAL FLEX

CS/40 12oz. EQUAL FLEX
IMIEQFXAC40

Your Price: $494.66
List Price: $833.42
41% off
(image for) New Pig

(image for) DROP CEILING LEAK DIVERSION SYSTEM

DROP CEILING LEAK DIVERSION SYSTEM
New Pig TLS367

Your Price: $300.48
List Price: $424.76
29% off
(image for) FJC

(image for) FJC 615DT R-134a Refrigerant with Stop Leak - 12 oz

FJC 615DT R-134a Refrigerant with Stop Leak - 12 oz
FJC 615DT

Your Price: $14.94
List Price: $16.99
12% off
(image for) FJC

(image for) FJC R-134a Refrigerant with UV Leak Detection & Stop Leak

FJC R-134a Refrigerant with UV Leak Detection & Stop Leak
FJC 623DT

Your Price: $19.74
(image for) Bar's Leaks - Rislone

(image for) Head Gasket Fix 24oz

Head Gasket Fix 24oz
Bar's Leaks - Rislone 1111

Your Price: $94.00
(image for) Radiator Specialty Company

(image for) Holdzit Strp 9" - 50 Pack

Holdzit Strp 9" - 50 Pack
Radiator Specialty Company R79B

Your Price: $57.42
List Price: $91
37% off
(image for) Solv-Tec

(image for) K Seal Heavy Duty Permanent Coolant Leak Sealer

K Seal Heavy Duty Permanent Coolant Leak Sealer
Solv-Tec ST5516

Your Price: $20.19
(image for) FJC

(image for) Kwik Seal (leak sealant) -

Kwik Seal (leak sealant) -
FJC 9165

Your Price: $24.68
(image for) Uview

(image for) Leak Guard One Shot catridge

Leak Guard One Shot catridge
Uview 480501

Your Price: $73.24
(image for) CRC Industries

(image for) Perm Head Gasket Rpr 32oz 6pk

Perm Head Gasket Rpr 32oz 6pk
CRC Industries 401232

Your Price: $145.18
(image for) New Pig

(image for) PIG Grippy Leak & Drip Mat - 32" X 50'

PIG Grippy Leak & Drip Mat - 32" X 50'
New Pig 25800

Your Price: $184.60
(image for) Vacutec

(image for) PLUG KIT

PLUG KIT
Vacutec CEA-02

Your Price: $17.33
List Price: $25.53
32% off
(image for) FJC

(image for) R134A STOP LEAK

R134A STOP LEAK
FJC 9140

Your Price: $8.27
(image for) Alemite

(image for) R134A W/ STOP LEAK, RED DYE

R134A W/ STOP LEAK, RED DYE
Alemite 618

Your Price: $23.24
List Price: $34.05
32% off
(image for) FJC

(image for) R134A W/STOP LEAK CONDITIONER

R134A W/STOP LEAK CONDITIONER
FJC 618

Your Price: $26.75
(image for) Radiator Specialty Company

(image for) Radiatr Lquid Repair 11Oz 12pk

Radiatr Lquid Repair 11Oz 12pk
Radiator Specialty Company C312

Your Price: $25.93
List Price: $36.96
30% off
(image for) Airsept

(image for) Smoke Treatment-Pint

Smoke Treatment-Pint
Airsept 60604

Your Price: $14.87
List Price: $21.31
30% off
(image for) Alemite

(image for) Spill Kit

Spill Kit
Alemite KIT441-WH

Your Price: $1,083.24
List Price: $1626.67
33% off
(image for) haltec

(image for) STABILIZER

STABILIZER
haltec H-2225

Your Price: $8.33
(image for) Brut Manufacturing

(image for) TANK CAP GASKET

TANK CAP GASKET
Brut Manufacturing 47100

Your Price: $2.18
(image for) Brut Manufacturing

(image for) TANK CLOSURE GASKET- SINGLE

TANK CLOSURE GASKET- SINGLE
Brut Manufacturing BR81400

Your Price: $50.03
(image for) CRC Industries

(image for) Trans Slip Stop 32oz 12pk

Trans Slip Stop 32oz 12pk
CRC Industries 402033

Your Price: $103.38
(image for) CRC Industries

(image for) Trans Slip Stop 32Oz EACH

Trans Slip Stop 32Oz EACH
CRC Industries 402033X6

Your Price: $18.55
List Price: $26.35
30% off
(image for) CRC Industries

(image for) Trans-X Transmission Stop Leak & Tune-Up 1X15OZ

Trans-X Transmission Stop Leak & Tune-Up 1X15OZ
CRC Industries 402015X6

Your Price: $68.80
List Price: $97.91
30% off
(image for) Krylon

(image for) Trueseal Rubberized Coating Black 12 oz.

Trueseal Rubberized Coating Black 12 oz.
Krylon 2701

Your Price: $16.42
(image for) Lang

(image for) Whistle for CLT-1 & CLT-2

Whistle for CLT-1 & CLT-2
Lang TU17

Your Price: $23.30
List Price: $24.27
4% off
(image for) FJC

(image for) Quick Seal 2 Oz Stop Leak and

Quick Seal 2 Oz Stop Leak and
FJC 9160

Your Price: $22.05
(image for) Absolute Coatings (POR15)

(image for) U.S. STANDARD TANK SEALER - 8

U.S. STANDARD TANK SEALER - 8
Absolute Coatings (POR15) 49216

Your Price: $20.02
Displaying 1 to 36 (of 93 products)

Stop Leak Products

Stop leak products are vital solutions for automotive mechanics and technicians, providing a quick, reliable way to address leaks and prevent costly system failures. Designed to seal cracks, repair rubber or metal components, and protect against further damage, stop leak products are a must-have for handling fuel systems, transmissions, brake lines, and more. These tools not only save time but also prolong the lifespan of critical automotive systems, keeping vehicles running smoothly and reducing the likelihood of expensive repairs down the road. Modern stop leak solutions are available in a variety of applications tailored to specific automotive needs. Products like the U.S. Standard Fuel Tank Sealer are specifically engineered to stop rust, corrosion, and leaks permanently, while being resistant to all fuels. Other options, like R134A Stop Leak, are designed to repair rubber components, such as hoses and O-rings in air conditioning systems. Additionally, versatile tools such as the Banjo Fluid Line Stopper ensure workspaces remain clean and organized by safely capping fluid lines during maintenance, preventing spills and costly fluid loss. These products not only improve efficiency in the shop but also simplify complex repairs, making them indispensable for professionals and DIYers alike. Incorporating stop leak products into your automotive toolkit ensures critical systems are safeguarded, reduces downtime, and gives you the confidence to tackle even the toughest repairs with ease.