How to Use Plumber’s Putty on Plastic Pipe Under Sink

If you’ve ever noticed a slow drip or moisture under your kitchen sink, you’re not alone—nearly 68% of U.S. homeowners attempt minor plumbing fixes themselves before calling a pro (HomeAdvisor, 2025). One common question that pops up: “Can I use plumber’s putty on plastic pipe under sink?” The short answer is yes—but only in specific…