@tlatoanitzin,
I was walking in the woods one time and found an old diaper that some animal had torn open. It has been raining the night before and the chemical/material inside the diaper looked like that.
It does not look like a slime-mold (which would be biological) and it does not look like plant sap of any kind. So I would guess that it's a man-made polymer for soaking up liquid (the kind of stuff they use in diapers) and someone spilled it out there and then the rain came and saturated it, and it expanded into clear polymer glop.