marybeth wrote:
snip
A backsplash should not be so
easily affected by water.

Thanks for your help.

You are quite right. However, most Formica is bonded to 'crumble board'
and once water damage occurs, no amount of gluing will save your
counter top. Odds are you need to shop for a replacement and soon.
If your budget is adequate, consider having a cabinet shop make you a
new countertop. If you ask them to use a high quality plywood it will
last for many years. This is typically how commercial installations are
done. One advantage is that the whole top is far more dimensionally
stable so unusual designs (and heavy sinks) can be accommodated with no
worries about butt seams springing leaks. HTH

Joe