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K-Seal Coolant Leak Repair

SKU ST5501

Typically ships in 5 to 7 business days.

K-Seal Permanent Coolant Leak Repair is designed to fix most leaks in all types of water cooled engines including cracked heads, head gasket failures, cracked blocks, radiators, heater cores and water pumps. Repairs cooling systems up to 20 quarts.

Product Specs for K-SEAL ST5501

  • Size:8 oz.
  • MPN: ST5501
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K-SEAL ST5501 Details

K-Seal Permanent Coolant Leak Repair kit repairs cooling systems up to 20 quarts.

  • Mixes with all types of anti-freeze and coolant, there’s no need to drain or flush the system before or after treatment.
  • Repairs are permanent even if fluids are drained later
  • Positively will not clog or damage any part of the cooling system
  • Works on hard plastics
  • Easy to use, just shake the bottle and add to the cooling system and go.

Customer Q&A - K-SEAL ST5501

My mechanic to me I have a crack in my radiator toward the top will the k-seal help instead of me having to buy new radiator. Thank you

Without seeing your radiator it is hard to say for certain that it will fix the leak. If the crack is in an area where there is coolant it will seal it up. If the crack is in an area that is air with no coolant, the sealant may not get to the area to seal. We have good luck with the K-Seal sealing radiator leaks with our local customers.


K-Seal is a brand manufactured by Solv-Tec. Solv-Tec develops top quality premium automotive additives throughout North America and also into overseas markets. The K-Seal formula is already a huge success in Europe and is now well on the way to becoming recognized as one of the leading coolant leak repair brands in the US.

Solv-Tec is a family business with a combined experience of over 60 years in domestic and international commerce. K-Seal is proudly made in the USA.

K-Seal Product Warranty

Money Back Guarantee

K-Seal offers a Money Back Guarantee if K-Seal does not fix your cooling system leak you can claim a full refund.

How to get service

Call K-Seal at 609-261-4242 or visit KSeal.com to claim a full refund of your purchase.

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