How to Repair a Silgranit Sink

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With the right tools you can fix a silgranit sink.
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Easier to maintain and cheaper than solid natural stone, a Blanco Silgranit sink is a safe choice for a gorgeous and durable addition to a kitchen or bathroom. The sturdy sink can get dingy and dirty but can be restored with regular maintenance.


Blanco sink scratches can be removed in an afternoon with the proper techniques and right detergents.

Cleaning a Composite Sink

While highly durable, a Blanco Silgranit composite sink doesn't do well with abrasive sponges or acidic cleaners. Use a gentle cleaner, such as a mix of mild dish soap and warm water, to clean the composite material on a regular basis.

For seriously dirty sinks covered with a layer of grease, sprinkle baking soda over the surface and allow it to sit for five to 15 minutes. Scrub the baking soda and grease away with a soft cloth and a mild detergent mixed with water. Repeat if necessary. Kitchen Remodel Guides recommends that you wipe up any water droplets in the sink regularly to keep hard water deposits from building up on the composite surface. Keep the surface clean and dry overnight to avoid stains and pits from gathering on the surface and creating a problem.

Removing Blanco Sink Scratches

A white haze on the surface of the composite sink can actually be small scratches from hard water. If the Blanco sink has scratches, which can happen no matter how careful you are, then removing them requires a bit of care and technique. After cleaning the sink thoroughly, mix equal parts of baking soda and water to make a paste. Apply the wet paste to the surface of the sink and let it sit for a few hours or overnight. Rinse the sink clean and buff it dry.

When to Re-Seal a Sink

If the haze is still visible after cleaning the composite sink, Better Homes & Gardens suggests that the surface may need to be re-sealed. This isn't as invasive as it sounds. Composite sinks that have been permanently etched by hard water deposits need a quick sanding, sealing and polishing.

Before you begin, the sink should be completely dry and clean. Do your best to remove any hard water deposit buildup or other layers of grease or grime. This ensures that the sealer will stick to the surface well and not peel.

Repairing Chips in a Sink

Blanco sink chip repair is fairly easy when you use the proper tools. Use a 400-grit sandpaper to remove the top layer of scratches from the sink. Be gentle and use small circular motions to get an even surface.

After sanding, you may find deeper scratches or more flaws on the composite sink. A Blanco Silgranit sink repair kit provides you with all the tools to fix any serious issues. Fill any divots or deep scratches with a composite sink repair epoxy or acrylic adhesive and sand these down by hand so that they blend well into the surrounding surface of the sink.

Wipe the sink down and allow it to dry before finishing with a liquid sealant and polisher. A Blanco Silgranit liquid sealer and polisher will return the shine to the surface. Use this once a month to keep the composite sink gleaming and protected.


Kimberley McGee is an award-winning journalist with 20+ years of experience writing for a variety of clients, including The New York Times, Las Vegas Review-Journal Home section and other national publications. As a professional writer she has researched, interviewed sources and written about home improvement, interior design and related business trends. She earned a B.A. in Journalism from the University of Nevada, Las Vegas. Her full bio and clips can be viewed at

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