I keep hearing words like "may, perhaps, could, etc". I have always heard not to use automotive antifreeze in a boiler and have avoided doing so. I went to a building and saw another contractor has put in (drums) of automotive antifreeze. I called the mfg and they say it's about 200 ppm of silicates. the boiler mfg has not returned my call. Before I go and make too many enemies I am wondering if this warrants removal and flushing of the system. Can I guarantee that it is not good for the system and why. Everything has to be in writing because lawyers may be involved. The auto glycol mfg told me they have a different specific product for boilers but wouldn't commit to it damaging their system.
I read this under automotive but is this just another mfg pushing their product?