Waterless Coolant systems...Good or Bad?

[Nostalgic]

(07-28-2024 )Smiling lemon Wrote:  I've been trying to figure out what has been gumming up my coolant system and I think the previous owner might have been running this stuff. Do you still remember anything about it? This stuff feels slimy but no grime, and non ferrous. When it is dried out it turns into a fine powder similar to flour.

I think Rawze said his was almost like crayon was coated on everything. Drying to fine powder almost sounds like some type of stop leak.