Original owner — Non transferable

Thermalweld guarantees it will permanently repair a blown head gasket, cracked head, or block. If in the first 30 days Thermalweld fails to repair your vehicle, e-mail a request for a full refund or call for a free re-treatment. The re-treatment will be sent at no additional charge (including shipping) with no hassles. Any time after the 30 days, if the Thermalweld fails at any point during the time you own your vehicle, we will send you additional product at no cost.


Money-back guarantee

30-day money-back guarantee

After 30 days automatically converts to an unconditional lifetime warranty.                                                           


Failed treatment/Retreat/Refund policy

Failed treatment

We include two Thermalweld treatments with order. If you feel the treatment process has failed, you must contact technical support before adding the second treatment.

  • The Technician will first make sure the directions were followed correctly and then perform a diagnostic review of your current situation.
  • In most cases, we’re able to identify an underlying problem that has gone undetected.
  • New procedural guidelines will be provided for the use of the second treatment.
  • Once repaired, the technician will perform a final diagnostic review and recommend after-care instructions.
  • If technical support is unable to resolve the problem with the second treatment, a 100% refund will be credited back to your account.



If Thermalweld fails during the warranty period, we will provide free retreatments, including shipping.

Refund request