Plumber's Putty For pinhole leaks or slightly larger, or if you have a leak at a fitting joint, plumbers putty is the simplest way to plug it and is widely available both online and in-store at DIY and home improvement stores.

To stop a water leak in an emergency situation requires a water leak sealant like Adiseal. It can seal leaks instantly even in wet conditions like rain. Adiseal leak sealer provides a strong and durable waterproof seal in dry or wet conditions.

Connections that rely on threaded pipes and fittings are prone to leaks if they're not sealed with either Teflon tape or Teflon pipe joint compound. Careful plumbers use both pipe joint compound and teflon on every joint for extra security. They don't want to come back.