Reefers, bookmark this post. It will come in very handy for the next rodeo.Got my overflow togeather. Used weldon 16 and laid some thick beads down the inside corners, went back over all the seams on the exterior with a much thinner bead of it just to hopefully make sure it's sealed up tight.
Next part of my plan is once I drill for my bulkheads and install them I will use the weldon 16 again to attach this to the base of my grow out tank (its an ABS tub so I shouldn't have any issues)
A slightly different approach on assembly for this. I taped it all up snug then attached a square to one of the corners. That squared the whole thing up nicely. I tacked the top and bottom edges to help keep the panels from moving any at first, then I was then able to set it on edge and run the weldon 16 down the inside seam. Made it very easy for me, after 45min I would spin the box to the next corner and do the next seam. Once the inside was done I went around the outside seams and ran the weldon over them to try and get them fused from both inside and outside seams. Luckily with this being all black making a little mess with the weldon or having some not so perfect seams is not a big deal and goes unnoticed.