K-Seal ST5516 Heavy-Duty Multi-Purpose One Step Permanent Coolant Leak Repair, 8oz, Pour and Go, Mixes with All Antifreeze, No Flushing Required
Description
🚀 Fix leaks fast, drive worry-free—your engine’s new best friend!
- INSTANT LEAK FIX - Permanently seals radiator, head gasket, freeze plugs & more in minutes
- EFFORTLESS APPLICATION - Shake, pour & go—no draining or flushing required
- UNIVERSAL COMPATIBILITY - Works with all antifreeze types for seamless integration
- ENGINEERED FOR HEAVY DUTY - Designed for commercial, agricultural & large engines
- TRUSTED PROFESSIONAL GRADE - Mechanic-approved, non-corrosive formula with ASTM D3147 certification
K-Seal ST5516 Heavy-Duty is a professional-grade, one-step coolant leak repair solution that permanently seals leaks in water-cooled engines within minutes. Compatible with all antifreeze types and requiring no flushing, it’s engineered for heavy-duty commercial and agricultural vehicles. Trusted by mechanics worldwide and independently tested to ASTM D3147 standards, it offers a durable, non-corrosive fix that enhances engine reliability and performance.
Specifications
| Manufacturer | Solv-Tec |
| Brand | K-Seal |
| Model | ST5516HD |
| Product Dimensions | 14.99 x 10.41 x 4.83 cm; 531 g |
| Item model number | ST5516HD |
| Manufacturer Part Number | ST5516 |
| Item Weight | 531 g |
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Reviews
A**N
Very effective with intake gasket coolant leak
I had an unsatisfactory result with one of my cars I earlier reviewed. However, I had a visible gakset leak between the plastic intake manifold and cylinder head in 2007 Town Car, and was about to remove it for servicing until I thought, let me give K-Seal another shot since I had a small quantity left. The result was magic! The leak is gone, and been running dry and clean for a month now.
T**Y
Good product. Quick delivery.
Happy with the product.
Common Questions
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