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Old 06-02-2021, 02:08 PM   #16
ryanheacox
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Location: Northwest CT
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Default Re: what now is best to prevent rust returning?

Quote:
Originally Posted by duke36 View Post
Check the MSDS sheets for the products. Ex: Thermocure is water and Diammonium Phophate (plant fertilizer, etc.), powder form available at Walmart, and others.

I'm going to have to experiment with that. I always figured Thermocure was just a concentrated Evapo-rust but it appears not. Either way, it's great at cleaning up a cooling system. The water comes out black, just like using evapo-rust.
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