First Mopar Restoration

I have never seen coolant look like that.
Almost looks like some sort of mutant gummy worm.
The consistency was very similar. It was reminiscent of the blue devil head gasket sealer if you are familiar with that. The previous owner said they probably used a “silver seal”. Not familiar with that but I’m guessing like the bars leak “copper seal”? Which doesn’t make sense because I didn’t see any metal flakes.