The Silicone Scandal: Why Your DIY Sealant Is Moldy and Peeling After Six Months

Few things are more frustrating than watching brand-new sink caulk peel, discolor, or grow mold within months. Most homeowners assume moisture is to blame—but the real culprit is usually the wrong product or poor application.

Many DIYers use general-purpose caulk instead of 100% silicone. Caulk dries rigid and cracks over time, while silicone remains flexible and waterproof. Using the wrong product guarantees failure.

Surface prep is just as critical. Old caulk residue, grease, or moisture prevent adhesion. Professionals clean with alcohol, dry completely, and apply silicone in a continuous bead without gaps.

The finishing technique matters too. Overworking the bead or wiping it dry removes necessary material. Silicone needs time to cure undisturbed—rushing leads to peeling.

At I Hate My Sink, sealing is treated as a precision task. When done right, silicone protects your countertop for years instead of months.

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