Silver Paste Solder question

I have some Vigor silver solder paste that I’ve had for around 30 years which has gotten a little too thick to be applied with the hypodermic syringe. All of my searching has only revealed that the solder/flux is in an “organic binder.”
Does anyone have any idea of what that “organic binder” might be? Or, a recipe for making paste solder.
My best guess for the binder is mineral oil but that could be way wrong.
Thanks for any info.
– alonzo

I loosened some up with a drop or two of mineral spirits…Rob


Thanks, Rob –
I’ll give that a try.
– alonzo

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See if it becomes useable with hair dryer heat