I have been using RMI25 for a while now and have some results for those interested. These pictures are just of my overflow tank, my whole cooling system has this snot or slime all over it. I've been doing some research and have found out that nearly all Anti freezes sold are the new "long life" anti freezes or Dex Clones. They have the same stuff as Dex Cool in them and this is typical Dex Cool damage. Anyhow, nothing could get this slime from dislodging from whatever it was stuck too, except this RMI25 stuff. I have done NUMEROUS back flushes and have added fresh coolant twice. I have also done prestone flushes that you have to do quick, and no results. Most people would have thought that their system would have been clean from that. Wrong answer, if you want to see if your system is clean or not try this RMI-25. RMI 25 is an additive not a flush, but it acts like a flush by cleaning your system.