K-Seal ST5501 Multi Purpose Coolant Leak Repair 8 fl oz Bottle For Cars, Trucks, and SUVs
K-Seal ST5501 Multi Purpose Coolant Leak Repair 8 fl oz Bottle For Cars, Trucks, and SUVs
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K-Seal

K-Seal ST5501 Multi Purpose Coolant Leak Repair 8 fl oz Bottle For Cars, Trucks, and SUVs

984 ratings
K-Seal ST5501 Multi Purpose Coolant Leak Repair 8 fl oz Bottle For Cars, Trucks, and SUVsK Seal Multi Purpose One Step Permanent Coolant Leak Repair 8oz Bottle2 pack K Seal ST5501 Permanent Coolant Leak Repair 8oz for Cars Trucks and SUVs3 pack K Seal T5501 Permanent Coolant Leak Repair 8oz for Cars Trucks and SUVs
Pack SizeSingle

Key item features

  • Cooling System Repair: Efficiently seals leaks and cracks present throughout your vehicle's cooling system, offering a reliable solution.
  • Key Component Sealing: Designed to effectively seal critical internal parts, including head gaskets, heater cores, and cylinder heads.
  • Effortless Application Method: Requires no time-consuming draining or flushing, allowing for a straightforward "pour and go" application process.
  • Universal Fluid Compatibility: Fully compatible with all existing types of antifreeze, providing broad applicability for various vehicle coolants.
  • Extensive Material Sealing: Works effectively to seal both hard plastic and various metal surfaces found within cooling system components.
  • Generous System Capacity: Capable of treating cooling systems with a substantial volume, specifically up to 25 quarts in size.
  • Wide Vehicle Suitability: Ideal for use across a broad spectrum of vehicles, encompassing cars, trucks, and sport utility vehicles (SUVs).
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Specs

Compatible cars, AllVehicle fitment type, UniversalBrand, K-SealColor, MulticolorVolume capacity, 8 ozSize, 8 fl oz

About this item

Product details

K-Seal ST5501 Multi Purpose Coolant Leak Repair is designed to efficiently seal leaks and cracks in your vehicle's cooling system. Ideal for use in cars, trucks, and SUVs, this easy-to-use formula requires no draining or flushing. Simply pour and go to effectively seal head gaskets, heater cores, and cylinder heads. Compatible with all types of antifreeze, K-Seal treats cooling systems with a capacity of up to 25 quarts and works on both hard plastic and metal surfaces to ensure a durable seal.
  • Seals leaks and cracks in your cooling system
  • Compatible with all types of antifreeze
  • No draining or flushing required for application
  • Effectively seals head gaskets heater cores and cylinder heads
  • Treats cooling systems with a capacity of up to 25 quarts in cars, trucks and SUVs
  • Seals hard plastic and metal
info:
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Specifications

Compatible cars

All

Vehicle fitment type

Universal

Brand

K-Seal

Color

Multicolor

Warranty

Warranty information

Money Back Guarantee

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Customer ratings & reviews

4.3 out of 5 stars
stars
984 ratings448 reviews
Includes global ratings and reviews
How item rating is calculated
  1. 5 stars70% (693)
  2. 4 stars11% (105)
  3. 3 stars5% (51)
  4. 2 stars2% (24)
  5. 1 star11% (111)

Reviews summary

Pros

  • : The product mounts using clear bottle directions.
  • : The bottle directions provide step-by-step guidance.
  • : The product blends readily into antifreeze and water.
  • : Offers good value considering its effectiveness.

Neutral

  • : The sealant stops slow coolant leaks but not larger breaches.
Generated by AI
Filtered and sorted results would be available on the new 'Customer ratings & reviews' page.
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Showing 1-3 of 448 reviews

Aug 22, 2026
Reviewer name: Kenneth
Top Reviewer
Item details
Multipack quantity: 1
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Use as a preventative measure too

It seals leaks and is a good idea to use it as a preventative measure when replacing water pumps or radiators. I've been using this for years.

Helpful?1XMJMMRYS4AF30391261
Jul 19, 2026
Reviewer name: Michael
Top Reviewer
Item details
Multipack quantity: 1
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Antifreeze leaks

It's been a month and no leaks.

Helpful?1XMJMMRYS4AF30391261
Aug 25, 2026
Reviewer name: Julie
Top Reviewer
Item details
Multipack quantity: 1
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

This kept my car running for another year!

This kept my car running for another year!

Helpful?1XMJMMRYS4AF30391261
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