Dear Customer,
We apologize for the inconvenience of having to use silicone caulking to resolve the leak from the pop-up drain assemblies. Our bathroom sink pop-up drain with overflow hole was designed to fit many different types of sinks and so silicone caulking may be needed for some.
Thank you for your review and rating. We will continue to work on making our product better.
Warm Regards,
Jess, Vigo Product Support