based on your response...
thank you guys for responding to my question on what kind of glue to use on c/t work my next c/t i'll try the joint fasteners thanks again tony e
It sounds like you never got a specific answer for the present situation. A waterproof glue like Titebond 3 will hold up longer than water resistant like Titebond type 2. A small amount brushed on both surfaces will not raise the grain. Any water that migrates into the seam WILL expand the substrate, and that will be an issue.
If the counters are post formed with a plastic laminate adhered on and NOT used with draw-tite fasteners you should screw and glue a bottom plate across the seam to support it and help bond it.
If they are a different type .... we don't know... then there may be a better solution. If they are already installed...we don't know, but it sounds that way, I would still plate across the bottom and screw but not glue in case a removal is necessary. \
More details will determine the best answer. :yes: