How to Caulk Corian Counters

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Things You'll Need

  • Silicone caulk

  • Scissors

  • Caulking gun

  • Sponge

Sometimes it's difficult to tell marble and Corian apart.

If you don't like the idea of having to seal your countertops periodically but still want the protection of a non-porous surface in your kitchen, Corian might just fit the bill. Corian is a solid surface option for countertops, sinks and backsplashes. When you order Corian, the manufacturer can take the dimensions of your counter space and provide you with a single sheet of Corian that fits your needs, eliminating the need to join separate pieces. While you may not need to caulk between your countertops, you must still caulk areas where your counters meet the adjoining wall.


Step 1

Move everything from the countertops into another room to protect your belongings from getting damaged or being in the way.

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Step 2

Snip off the tip of the tube of silicone caulk, using scissors. Cut at a diagonal in either direction.

Step 3

Pull the rod at one end of the caulking gun all the way back. Insert the tube of caulk into the caulking gun and snap the tip of the tube into place at the end of the caulking gun.

Step 4

Position the tube's tip in the area between your Corian countertop and the wall. Hold the gun at a 45-degree angle.


Step 5

Squeeze the trigger of the caulking gun and move slowly along the space, expressing caulk as you go. Continue caulking until you complete the line.

Step 6

Apply pressure to the caulk line with a damp sponge. Tool the caulk line by moving the sponge down the line of caulk, using steady pressure. This thins the caulk and leaves a cleaner, even caulk line.


You can also tool the caulk with your finger.

If you only need to caulk a small area, purchase caulk in a squeeze tube that doesn't need loading into the caulking gun. Merely squeeze it out into the space between the counters and the wall.

Take a photograph of your Corian countertop when you purchase caulk. Corian comes in a variety of different colors, and standard white caulk doesn't mesh well with every color. The photo can help you choose the right shade of caulk for your Corian.


Once you start expressing caulk, don't stop until you reach a corner or wall. You must stay in motion to create a smooth, even line of caulk.

Use only silicone caulk. Although it costs more than latex, oil-based or polyurethane caulk, its flexibility and durability make it ideal for kitchen applications.


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