Corian sinks are often used in kitchens because they do not allow liquids to penetrate and stain the material internally. However, a stain can always form on the surface of Corian, and will then need to be removed. Coffee stains are one of the most common stains found on kitchen surfaces. The important thing to remember about Corian sinks and countertops is that harsh chemicals and abrasives should never be used on them. The surface can easily scratch, and abrasives can remove the finish.
Combine soap and hot water to create a sudsy mixture. Soak the sponge or cloth in the soapy water and wipe down the area where the coffee stain lingers. Always use hot water and a mild dish detergent or mild surface spray. Anything with harsh chemicals will damage the Corian.
Spray the area with an ammonia-based cleaner. This will help lift any discolouration left from the coffee stain after it has been washed away.
Pour a small amount of powdered bleach onto the stained area if the discolouration remains. Make sure the surface is damp but not soaked. Let it stand for a few minutes before wiping it off with a soft cloth. You can use baking soda if you prefer. It is less harsh than powdered bleach but will have the same effect for removing discolouration as well as any lingering odours.
Fill the sink halfway with warm water and pour in no more than two teaspoons of liquid bleach. Let the solution soak in the sink for a few hours to even out the entire Corian sink’s colouring after the coffee stain is removed. You can do this once or twice a week to help remove any other stains or stuck-on oils that you may not have noticed while cleaning.