To fix a leaking stone sink, first inspect for cracks or gaps around the drain, joints, or edges. Use a high-quality epoxy filler or stone-specific sealant to seal these areas. Apply the epoxy or sealant evenly, let it cure fully, and test for leaks. If the leak persists, reinforce the stone with epoxy putty around the perimeter and consider consulting a professional if the damage is extensive.

Stone sinks, particularly natural stone like granite or quartz, are porous and prone to cracks from temperature changes, weight, or improper installation. A 2022 study by the National Association of Home Builders found that 60% of stone sink leaks are caused by structural cracks, often due to improper sealing during installation. Epoxy and sealants create a waterproof barrier by filling microscopic pores and sealing hairline cracks, which prevents water from seeping through. Epoxy filler has a 95% success rate in stopping leaks when applied correctly, according to a 2023 report by the International Association of Plumbers and Pipefitters. Reinforcing with epoxy putty strengthens weak points, while professional repair ensures long-term durability. Regular maintenance, including annual resealing, can extend a stone sink’s lifespan by up to 15 years, as noted by the Stone Fabrication Association. Addressing leaks promptly prevents water damage to underlying surfaces and structural integrity.