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🛠️ Fix it once, drive forever—no more leaks, no more worries!
K-Seal ST3501 is a professional-grade, 16oz head gasket sealer that permanently repairs blown head gaskets, cracked heads, and porous engine blocks. Featuring a formula with 33% more sealing power and ceramic micro-fibers, it seals leaks up to 0.64mm without engine downtime or flushing. Compatible with all coolants and engine materials, it’s trusted by mechanics worldwide and independently verified to meet ASTM D3147 standards.





| ASIN | B00QYZIVA6 |
| Best Sellers Rank | #21,806 in Automotive ( See Top 100 in Automotive ) #147 in Oil & Fluid Additives |
| Brand | K-Seal |
| Customer Reviews | 4.0 4.0 out of 5 stars (2,002) |
| Date First Available | 4 February 2015 |
| Item Weight | 454 g |
| Item model number | KSLST3501 |
| Manufacturer | Solv-Tec |
| Manufacturer Part Number | KSLST3501 |
| Model | ST3501 |
| Product Dimensions | 6.35 x 6.35 x 20.32 cm; 453.59 g |
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