CRC Thermocure Coolant System Rust Remover, 32 Oz, Rust Remover for Vehicle Cooling Systems, Removes Rust Scale and Deposits

This is the product if you have rust in your coolant system. My race car runs only water so after a few seasons, major rust (bright orange water). Thermocool is the only cleaner product I find that gets all rust cleaned out. Fantastic product!

This product is absolutely amazing, and it works just as described. I had been suffering from overheating. I have tried several flushes with no good results, and I constantly have rust in my block due to the previous owner running straight water for an unspecific amount of time. But now, with one evaporation treatment, there is no longer rust in my block, my radiator, or my overflow tank anywhere. I would highly recommend you buy this product and utilize it.

This is the truth!!! I tried using Blue devil initially and it did not get the rust out of my 5.4 Triton. I bought this used it for 2 hours drove the car around. And this flushed all the rust out. I would buy again!!!

Put in Challenger RT as directed due the presence of rust in radiator fluid. Ran with water for 375 miles. When removed the water had the consistency of naval jelly, or a thick oat water, and reeked of sulfur. Fluid was very difficult to remove from engine. Had to fill, run, and flush the system multiple times. System even became clogged at one point and had to force clog loose with back flow water pressure. I’m not saying that my vehicle wasn’t a contributing factor, (however initial rad flush before treatment was added flowed freely) there has been cooling issues with this car since bought <6 months back. Despite my troubles the product seems to have completely removed the rust, and I have had no further issues, but I wouldn’t call the difficulty in removal confidence inspiring.This all said my parting words are to get ready to flush your engine more than you ever thought you would ever need or want to do. I don’t believe I make any exaggeration when I say that I probably went through a hundred+ gallons of water to get this cleared out.

I was skeptical of how well this would work. My cooling system was severely rusted. I went ahead and used this treatment. There is not a spot of rust anywhere in the cooling system. After using this product months ago I decided to see how my coolant looked. It looks brand new still. No more rusty brown coolant.

Sealed up the heater core radiator… Great product

Fantastic product! Used on my 1998 Ford F150. Inherited this vehicle, never serviced. I followed the directions. It took 3 complete flushes to remove the contaminants. Worth the effort and time!

Does work really good removing all the rust. Flushed it out and now comes out clean no orange at all. Now be careful with very old engines like mine, cause inside engine block is rusty and you remove the rust then it might start seeping threw the gaskets and start burning coolant like mine did. Now I’m burning about a gallon of coolant a month. But not a surprise and to be expected with a 30 year old 200k+ miles engine.