Neither is universally better; the choice depends entirely on your specific material and application.
Plumbers putty is preferred over silicone for drain assemblies and faucet bases because it never hardens, allowing for easy repositioning and quick removal later. Unlike silicone, it requires no cure time and wipes up effortlessly without damaging surfaces or permanently cementing parts in place.
When choosing between plumber's putty and silicone for a plumbing fixture, putty is ideal for quick, adjustable seals on sink drains and faucets. Silicone is superior for long-lasting, permanent, watertight bonds, especially in high-moisture areas like shower drains and bathtubs.
You can, but plumbers putty is usually better for sink drains. Silicone works — just clean and dry the surface first. It's preferred.
Avoid using plumber's putty on pressurized water lines, porous materials (like natural stone or marble), plastics (such as ABS or acrylic), and bathtub waste fittings. Putty will stain stone, degrade plastic, and wash away under pressure. Instead, use silicone or thread-sealing tape.
Plumber's putty is designed to prevent water from migrating between two rigid, non-pressurized surfaces (such as under a sink drain or faucet). It is not a glue or adhesive and will not seal holes, cracks, or pressurized leaks in pipes.
Silicone caulk is generally considered the best alternative to plumbers putty. It creates a strong, permanent, waterproof, and flexible bond that outlasts putty in high-moisture and high-pressure areas.
For a shower drain, 100% silicone is the best choice. While plumber’s putty is great for sinks, it dries out and fails over time when exposed to the high loads, thermal expansion, and constant water submersion of a shower base.
While it is nearly impossible to use "too much" plumbers putty regarding the seal, an excessive amount will create a time-consuming mess and can squeeze out underneath, potentially breaking seals on certain fixtures.
Silicone Sealants
Silicone is very flexible and acts as a water and moisture repellant, making it among the best caulks for both windows and bathrooms. Pure silicone is more expensive than latex caulk, but it is highly durable.
Recently, I tried out these silicone thread seals given by a friend which he claimed to be a great alternative to plumber's tape when installing wall tap. Well indeed it was a breeze, I can easily orientate the tap without having to tightened all the way in and it remains properly sealed.
Most silicone isn't paintable, so you wouldn't want to use it in areas that would get painted at any point. If you're looking at exterior products, polyurethane caulk is a good option as well. Most caulks will do that if not painted.
Silicone grease is a waterproof, heat-resistant lubricant used in plumbing to lubricate moving parts, preserve rubber seals, and prevent leaks. Because it contains no petroleum, it won’t degrade rubber or plastic and is safe to use in drinking water systems.
In addition to its functional properties, plumber's putty is also long-lasting. Unlike other sealants, it doesn't dry out or shrink over time, ensuring that it provides a robust seal for many years.
No matter the installation type, any good plumber knows the importance of ensuring a watertight seal. This not only keeps moisture out but is crucial to the longevity of the infrastructure. Many plumbers have found success using silicone sealant, a highly versatile material prized for its waterproof properties.
Plumber's putty is your go-to for plumbing-related tasks. Key usages include: Sink Drains: Form a seal between the sink drain and the bowl to prevent leaks.
There are several applications that aren't suitable for plumbers putty, including: Installation of plastic fittings and fixtures. Installation on acrylic surfaces. Sealing pipe threads.
Wait about 10 minutes before running water if you live in a cold or humid environment. After about 10 minutes, run a small amount of water to test the seal after installation and check underneath for leaks. Do not use plumber's putty that feels dry or cracks when rolled; it will not form a proper seal.
Common Plumbing Mistakes When Using PTFE Tape
If you are working on indoor fixtures like sink drains or faucet bases, plumber's putty is often the better choice because it is easy to apply and remove. On the other hand, for areas exposed to constant water, pressure, or outdoor conditions, silicone provides a stronger, long-lasting seal.
Yes, you can use 100% silicone instead of plumber's putty. In fact, many plumbers prefer it because it creates a permanent, adhesive, and flexible bond. However, there are a few important rules to keep in mind, as silicone behaves much differently than putty.
Loctite 100% Silicone is ideal for use on sinks and plumbing fixtures because it creates strong, watertight seals that are resistant to mold and mildew. It also dries quickly and can be exposed to water just 2 hours after application.
No, plumber's putty is not permanent. It is designed to be a soft, pliable, clay-like, non-adhesive sealant. Because it never fully hardens or glues surfaces together, it is incredibly easy to remove, adjust, or replace whenever you need to service a fixture.
No, you cannot use WD-40 instead of plumber's grease.
Don't Use Silicone Caulk in Your Bathroom