Sealer is not going to make the grout stick to the solid surface material.
What makes solid surface so great is that things don't stick to it very well
especially a portland cement based product such as grout.

I can't imagine that an installer would grout the joint and expect it to
work. The joint is generally filled with silicon caulking because it has to
flex. The best way is to leave the joint unfilled so when the caulk is
applied it fills the joint and creates a better joint.

The big problem that you are going have is finding matching caulk. Some
grout manufactures make matching caulk its not silicon but it would flex
better than grout (which doesn't flex at all). Every time I have been given
the choice of grout color I always pick a grout that has a matching caulk.


"Patrick Holzer" wrote in message
...
We have solide surface counters and ceramic tile backsplashes. The
joints where the counter meet the tile are grouted and are cracking.
Almost along every joint on every counter surface. The grout is about
6 months old and have been sealed.

I am assuming this is common and due to moisture, surface flexing,
heat, etc. The question is: Is there anything I can do to keep this
from happening?

Thanks,
Patrick