I'm in the process of building a sandbox for the grandkids in NC. It was LOML's idea! Anyway, picture 4/4 white oak planks about 15" wide and five feet long. Rough cut box joint ends - 2.4" cuts. I'm building seats for each of the 4 corners.
I know Tightbond I, II, and III. What I don't know is the best outdoor gap filling glue. Something that will hold it together but still move with the wood. Tightbond is great indoors but is hard and won't move with the wood.
It's currently dry assembled in the back yard, the seats made, glue blocks screwed to the seats but not fitted or glued yet. In two weekends we will be carrying the pieces down to NC and assembling it there. Our son is in charge of filling it!
So what is the best outdoor gap filling construction adhesive?