cracked counter top

If it's Corian, you can't get the proper DuPont repair materials. DuPont will only sell them to "licensed" Corian repair/installers. We have a similar material called Avonite that Tiffin uses in their coaches. When buying a new 2008 Allegro Bus the DW insisted on a gas range and oven, and the one the dealer had was a drop in cook top, so the dealer ordered the proper top from Tiffin and was to swap it out. When it arrived, it was cracked, right in front of the sink, but the dealer swore he could get it fixed and I could then decide if I wanted to take it or not. I knew EXACTLY where the crack was and when it got back from the repair guy, I couldn't see it, couldn't feel it, and couldn't even smell it (LOL). They put it in and we spent 75,000 great miles in that coach without a problem with the top. If you have a support issue causing the crack, that surely needs to be addressed, but once a crack in that stuff is repaired, the repair won't fail unless something causes it to fail.