Can you use this product on corian countertops?

Yes, you will just need to follow this special prep: Be sure to remove any clear silicone caulk used in the seam at the bottom of your backsplash and around your sink before applying Giani. As with all coatings, Giani will not adhere to silicone. After cutting and peeling up any clear silicone caulk, wipe up any remaining residue with rubbing alcohol. Let it dry, then proceed with the standard Giani process. In addition, you will need to de-gloss your corian surface before applying the Giani primer. Simply rough it up with a very fine grit #600 sand paper and wipe it clean with a damp cloth. Allow to dry. You may re-apply acrylic or latex caulk in the seam at the bottom of your backsplash after you've completed the Giani process.