How to Seam Corian Countertops


Corian countertops are made from a solid sheet of molded plastic. The process to join sections, such as corners, is different than conventional laminate countertops. The company that makes the countertops recommends only qualified and properly trained installers for mounting Corian countertops, but the process of joining them is easy once you learn how to seam the countertops in place.

Things You'll Need

  • Alcohol
  • Rag
  • Silicone adhesive
  • Seam support strip
  • Epoxy glue
  • Hot glue
  • Wood blocks
  • Cabinet clamps
  • 100-, 150- and 220-grit sandpaper
  • Orbital sander
  • Buffer pad and drill
  • Remove any dirt or residue from the edge of each side of the counters to be seamed, and the seam support strip, by wiping with alcohol.

  • Apply silicone caulk to the top edge of the base cabinets and place the support strip centered under the seam.

  • Apply a thick coating of epoxy adhesive to the edges of the Corian countertops where they will be joined. Apply a coating of epoxy adhesive to the support strip.

  • Place wood blocks in two places on each side of the seam. Attach the blocks to the countertop with hot glue. Allow the glue to cool so the blocks are securely in position.

  • Position a cabinet clamp to the blocks on each side and tighten the clamps to pull the two sections of the countertop tightly together. Do not wipe off the epoxy glue that will be pressed out of the seam.

  • Allow the epoxy glue to dry according to the drying time stated on the package label.

  • Remove the cabinet clamps from the wood blocks. Pour alcohol around the wood blocks to loosen the hot glue and remove the blocks from the Corian countertop sections.

  • Sand the seam with an orbital sander starting with 100-grit sandpaper. Follow with 150- and then 220-grit sandpaper to remove the epoxy glue and finish the seam.

  • Polish with a buffer pad on a drill on low speed, or use a buffer.

Tips & Warnings

  • Follow all safety precautions, such as having adequate ventilation, when using epoxy glue.

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