There is a 3D-print-specific product listed called 3D Gloop! which is generally used as a glue to hold plastic parts together, but can also act as a fill in a pinch.

3D Gloop is a solvent-based adhesive that chemically welds together plastics like PLA, PETG, and ABS/ASA. The exceptionally strong bond is arguably the strongest you can create for 3D printed parts.

Health Mussel gloop can be used to make wounds knit without any scars By Alice Klein 12 May 2017 ...

The slimy sea dweller piqued Kuster's interest two years ago when he saw a BBC documentary about the hagfish, a creature that immediately fascinated him. "As a chemist and material scientist, I couldn ...

Gloop from the deep sea Date: January 20, 2016 Source: ETH Zurich Summary: Scientists are researching the unusual secretions of the hagfish. Over the next three years, the researchers will try to ...