K-Seal
K-Seal ST3501 Pour & Go Head Gasket Sealer, 16 oz – Repairs
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Highlights
- FIX IT FAST: Our advanced formula with 33% more sealing power than regular K-Seal, ensures a long-lasting, seal for challenging leaks. Fixes blown head gaskets, cracked heads & porous engine blocks in cars
- STOP HOLES & CRACKS: With just 1 step our unique formula with ceramic micro-fibres, will seal leaks up to 0.64mm in size, without any adverse impact on the engine
- VERSATILE COMPATIBILITY: Works with all types of coolant & compatible with a wide range of vehicle engine materials & heavy duty machinery.
- Attention: If you notice bubbles coming from the radiator or coolant reservoir, or if K-Seal engine coolant stop leak is not sealing, the system might be over-pressurized. Refer to the Technical Specification section of this page for additional instructions to ensure a successful repair. Over 8 million bottles sold worldwide!
Why You'll Love It
- Delivers 33 percent more sealing strength than standard K-Seal for tough internal leaks
- Uses ceramic micro-fibres to fix holes and cracks up to 0.64mm without engine damage
- Requires only a simple one-step pour without complex system draining
- Repairs blown head gaskets, cracked cylinder heads, and porous engine blocks
- Mixes safely with all coolant types across various engine materials and heavy machinery
Pros
- +Simple one-step pour application
- +Compatible with all coolant types
- +Works on heavy machinery and cars
- +Higher sealing strength than standard formula
- +Seals cracks up to 0.64mm
Cons
- -Cannot seal holes larger than 0.64mm
- -Requires extra steps if system is over-pressurized
Detailed Review
K-Seal ST3501 Pour & Go Head Gasket Sealer is a 16 oz chemical repair formula designed to address serious engine cooling issues without a mechanical teardown. It targets blown head gaskets, cracked cylinder heads, and porous engine blocks in standard cars as well as heavy duty machinery.
The formula incorporates ceramic micro-fibres designed to fill cracks and holes measuring up to 0.64mm in size. It provides 33 percent more sealing power compared to the standard K-Seal formula, making it suitable for challenging coolant leaks while operating safely without adverse impacts on engine components.
Application is designed as a simple one-step process that works alongside all types of engine coolant. However, if your cooling system is over-pressurized or shows bubbling in the radiator or coolant reservoir, the sealer may struggle to hold unless you follow specific technical guidance to relieve that pressure.
Verdict: K-Seal ST3501 is a practical, heavy-duty solution for vehicle owners dealing with head gasket or block leaks up to 0.64mm. If your system is free of severe over-pressurization, this one-step formula offers a fast repair compatible with any coolant.
Who Should Buy It
A great fit if you:
- Need to repair a blown head gasket, cracked head, or porous block.
- Want a fast one-step additive that works with any engine coolant.
- Have coolant leaks measuring 0.64mm or smaller on cars or heavy equipment.
Consider something else if you:
- Have large structural cracks exceeding 0.64mm in size.
- Are dealing with extreme cooling system over-pressurization issues that prevent sealing.
FAQ
What types of engine damage does this formula repair?
It repairs blown head gaskets, cracked cylinder heads, and porous engine blocks in cars and heavy duty machinery.
What size leaks can K-Seal ST3501 fill?
The ceramic micro-fibre formula seals holes and cracks up to 0.64mm in size.
What should I do if bubbles appear in the radiator or reservoir?
Bubbles or failure to seal indicate the cooling system may be over-pressurized, which requires consulting the technical specifications for extra instructions.
Product Details
| Brand | K-Seal |
| ASIN | B00QYZIVA6 |
