Medium thick (750 cps), flexible for >.008 gap filling.
ADHESIVES PB100, PB750, PB1500 AND JURASSIC GEL 4540:
These are the high strength adhesives used to bond fossils back together. Each adhesive has a different thickness (viscosity/centipoises); the higher the number, the thicker the adhesive. You need a strong adhesive to make up the difference of error between the two opposing surfaces you intend to bond together. Whichever adhesive you choose, you will acquire your favorites for future use.
PB750 was developed to hold very porous fossil pieces together. Dries in about 10 minutes.