K-Seal ST5501 Multi Purpose One Step Permanent Coolant Leak Repair - 1 or 6 Pack
This permanent coolant leak repair formula seals cracks and holes throughout the engine’s cooling system. It’s compatible with all antifreeze types and installs easily with a simple shake-and-pour process—no draining or flushing required.
Specifications & Features
- Application: Radiators, head gaskets, heater cores, freeze plugs, water pump casings, cylinder heads, and engine blocks
- Sealant Composition: Ceramic microfibers and copper particles suspended in a proprietary fluid
- Leak Size Capacity: Repairs holes up to 0.635 mm
- Mixes safely with all types of antifreeze — no chemical incompatibility concerns
- Seals form under system pressure and heat to create a long-lasting bond
- No draining, flushing, or system teardown required before use
- Used by professional technicians and fleet maintenance crews worldwide
- Fixes coolant leaks fast to prevent engine overheating or failure
Compatible Leak Types
- Head gasket leaks where coolant enters the combustion chamber
- Cracked engine blocks or stressed cylinder heads that allow coolant to escape
- Water pump and radiator leaks caused by age, vibration, or thermal cycling
Select Pack Size
From $7.52
Original: $21.49
-65%K-Seal ST5501 Multi Purpose One Step Permanent Coolant Leak Repair - 1 or 6 Pack—
$21.49
$7.52Product Information
Product Information
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Description
This permanent coolant leak repair formula seals cracks and holes throughout the engine’s cooling system. It’s compatible with all antifreeze types and installs easily with a simple shake-and-pour process—no draining or flushing required.
Specifications & Features
- Application: Radiators, head gaskets, heater cores, freeze plugs, water pump casings, cylinder heads, and engine blocks
- Sealant Composition: Ceramic microfibers and copper particles suspended in a proprietary fluid
- Leak Size Capacity: Repairs holes up to 0.635 mm
- Mixes safely with all types of antifreeze — no chemical incompatibility concerns
- Seals form under system pressure and heat to create a long-lasting bond
- No draining, flushing, or system teardown required before use
- Used by professional technicians and fleet maintenance crews worldwide
- Fixes coolant leaks fast to prevent engine overheating or failure
Compatible Leak Types
- Head gasket leaks where coolant enters the combustion chamber
- Cracked engine blocks or stressed cylinder heads that allow coolant to escape
- Water pump and radiator leaks caused by age, vibration, or thermal cycling
