Our Money-Back Guarantee: Real Support, Real Confidence
At Thermalweld, we know how frustrating and expensive head gasket problems can be. That’s why we’ve built a repair system that’s different — not just in performance, but in honesty.
We’re confident in our product. Confident enough to offer a genuine money-back guarantee if it doesn’t work for you. Not a gimmick. Not a loophole-ridden offer. Just fairness.
How It Works
Use the first half of the Thermalweld bottle as instructed
Follow the process carefully — this step alone resolves most head gasket issues when used on the correct type of failure.If symptoms remain, don’t guess or pour the second half yet.
Instead, go to Thermalweld.co.uk and speak to our tech support team via live chat.You’ll be asked a few diagnostic questions
This helps us confirm whether you truly have a blown head gasket, or if the problem is something else (like a stuck thermostat, coolant flow issue, or back pressure).Based on your answers, we’ll do one of two things:
If it’s not a head gasket → You get a full refund, even if you just misdiagnosed the issue.
If it is a head gasket → We’ll provide you with tailored instructions on how and when to use the second half of the Thermalweld bottle.
Still not fixed after that?
If you followed the instructions and it still doesn’t work — you’re still covered.
We’ll refund your purchase in full.
Why We Do It This Way
Most products on the market give you one shot and walk away. We don’t.
We understand that diagnosis can be tricky. Overheating, bubbling, coolant loss — they aren’t always caused by a head gasket failure. That’s why we’ve built our guarantee around support, not just a refund.
Our only request: Don’t pour the second half of the bottle before speaking to us.
Doing so can reduce your chances of success — and makes it harder for us to help.
What You’ll Need
To qualify for the money back guarantee:
You must have a receipt proving you purchased Thermalweld.
You must provide your CSN (Customer Service Number)
You must have followed the instructions and contacted tech support before using the second half
We believe this is the most honest and customer-focused guarantee in the industry. You get real support, expert diagnosis, and a second chance at repair — all backed by a promise that you won’t be left out of pocket if things don’t go to plan.
Thermalweld works — and we’re here to prove it.