Whats the strongest all purpose glue available?

Strong? Measured how? Tensile testing? How soon after bonding?

Cyanoacrylate glues show excellent strength within seconds after bonding, but they don't perform so well over time. And they only work really well on certain clean, non-porous surfaces. Gluing leather to wood does not work well.

Barnacals, oysters and such have stronger glues than we can make. Blood and milk mixed is the hardest stuff I ever tried to get off of anything. They used it for paint on farms in 1700 and

Gordon Couger Stillwater, OK