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K-Seal ST5501 Multi-Purpose One Step Permanent Coolant Leak Repair, 8oz, Pour and Go, Mixes with All Antifreeze, No Flushing Required

K-Seal
Category: Automotive > Oils & Fluids > Additives > Cooling System

Price

$12.47

Rating

4.3(12,938 reviews)

Description

Experience the ultimate solution to coolant leaks with the K-Seal ST5501, a multi-purpose, one-step permanent coolant leak repair. Our powerful formula works seamlessly with all antifreeze, making it a universal fit type for all your needs. No need for draining or flushing your system. The K-Seal ST5501, also known as a head gasket stop leak, works by sealing leaks efficiently and permanently. It also doubles as a radiator stop leak, effectively putting an end to any leaks in your radiator. The permanent leak sealer is easy to use - just shake, pour, and go. This product excels in fixing cracks and leaks in several components including the radiator, head gasket, freeze plugs, cylinder heads, heater core, water pump casing, and engine blocks. With a single 8 fluid ounce bottle of our coolant leak sealer, you can treat up to 20 quarts cooling capacity. This heavy duty stop leak sealant is a must-have for all your coolant leak issues. So, forget your coolant leak worries with the K-Seal ST5501 HD. Experience the power of a seal stop leak that stops leaks permanently, offering peace of mind and extended life for your vehicle's cooling system. Trust the K-Seal coolant leak repair for a lasting solution to all your coolant leak problems.

Key Features

  • FIX IT FAST: Our multi-purpose solution works in minutes to quickly & permanently seal leaks in the radiator, head gasket, freeze plugs, block, heater matrix & water pump. Fixes most leaks in water-cooled engines
  • STOP HOLES & CRACKS: With just 1 step our unique formula will seek out each hole & crack, permanently sealing them, without any adverse impact on the efficiency of your engine cooling
  • EASY TO USE: K-Seal couldn't be simpler to use & requires no draining or flushing; just shake, pour & go - shake the bottle, add the fluid to your coolant system & run your engine as normal
  • VERSATILE COMPATIBILITY: Compatible with all types of antifreeze coolant. Suitable for use in both cars & light trucks with up to 12 cylinders. A permanent repair for the lifetime of the engine
  • PROFESSIONAL-GRADE RELIABILITY: Trusted by mechanics, our sealer delivers a durable & long-lasting repair. A cost-effective solution to engine coolant leaks, enhancing the reliability & performance of your vehicle’s cooling system. We've sold millions worldwide & are independently verified by university testing to meet ASTM D3147
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Product Details

Product ID

B001QT9KO6

ASIN

B001QT9KO6

Category

Automotive > Oils & Fluids > Additives > Cooling System

Reviews

12,938

Prime Eligible

Yes

Last Scraped

2/18/2026

Technical Details

AsinB001QT9KO6
Best sellers rank#1,538 in Automotive (See Top 100 in Automotive) #1 in Cooling System Additives
BrandK-Seal
ColorBLUE
Customer reviews4.3 4.3 out of 5 stars (12,938) 4.3 out of 5 stars
Date first availableJanuary 26, 2009
Global trade identification number05060002968017
Is discontinued by manufacturerNo
Item dimensions l x w x h3.5 x 1.5 x 4.5 inches
Item formLiquid
Item model numberST5501
Item weight9.2 ounces
ManufacturerSolv-Tec
Manufacturer part numberST5501
MaterialPlastic
ModelK-Seal ST5501 Multi Purpose One Step Permanent Coolant Leak Repair
Number of items1
PositionInner
Product dimensions3.5 x 1.5 x 4.5 inches
StyleCompact
Surface recommendationMetal
Unit count1.0 Count
Upc367157659506 812646010004
Water resistance levelWaterproof

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