How to Prep Your Countertop for a New Sink

Before installing your new sink, proper countertop preparation is essential. A rushed or uneven setup can lead to leaks, poor alignment, and long-term damage. Whether you’re replacing an old sink or upgrading your kitchen, here’s how to get your countertop ready the right way.

Start by removing the old sink and cleaning the opening thoroughly. Scrape off any old caulk or debris using a putty knife, then wipe the area clean with rubbing alcohol. This ensures your new sealant will adhere properly.

Next, measure your cutout carefully. Even small variations can affect how your sink fits. If you’re upgrading to a different style—say, from a drop-in to an undermount—consult your sink’s template to adjust the opening accordingly.

Check your countertop stability. Cracks, chips, or soft spots can prevent proper sealing and should be repaired before proceeding. If you’re working with natural stone or quartz, consider adding extra support brackets for heavier sinks.

Before setting the new sink, apply a bead of waterproof silicone sealant around the cutout edge. This creates a watertight barrier and prevents future mold or mildew buildup.

At I Hate My Sink, we prepare every countertop with precision and care, ensuring your new sink fits perfectly and stays secure for years to come. Because the secret to a flawless installation starts long before the sink goes in.

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