Plumbers Putty

Plumbers putty is a pliable, non-hardening plumbing sealant used to create watertight seals around sink drains, basket strainers, tub drains, and faucet bases. It conforms to irregularities between flanges and countertops or sink bowls, blocking leaks while allowing future disassembly. Ideal for kitchen and bathroom installs and repairs.

Benefits include fast application, immediate readiness for light water exposure, easy cleanup, and long-term pliability that resists cracking. Unlike silicone caulk, it stays soft for serviceable joints; unlike pipe dope or PTFE tape, it is not for threaded or pressurized connections. Use plumbers putty where a gasket-like seal is needed under a fitting’s lip.

Choose the right formula. Traditional oil-based putty is budget-friendly and durable, but may stain porous materials. Stain-free plumbers putty is designed for granite, marble, quartz, and other natural stone. For plastic components, check compatibility notes—some oils can soften ABS or PVC. If contact with drinking water is expected, look for NSF/ANSI 61 certification. Common sizes range from small 3–8 oz cups for a single project to 1–5 lb tubs for frequent use.

How to use: clean and dry both surfaces. Roll a rope between your palms, press it evenly around the underside of the flange, then seat the fixture and tighten the nut hand-tight plus a quarter turn. Trim or wipe away squeeze-out. Do not overtighten, which can warp thin sinks or squeeze out too much putty. Follow the manufacturer’s guidance on exposure to water and any cure or set recommendations.

Store resealed tubs in a cool, sealed state to prevent skinning. For seals under continuous movement or where UV exposure is likely, consider a silicone or polyurethane sealant instead. With the right product and technique, plumbers putty delivers reliable, clean-looking seals that keep bathrooms and kitchens dry. It’s affordable, forgiving, and trusted by DIYers and pros alike.