What is the difference between plumbers caulk and regular caulk?

Author: Mikayla Collier  |  Last update: Friday, April 25, 2025

Caulk is a plastic-based substance that hardens as it dries, while plumber putty consists of a rubber-like substance that will not harden when it dries. This makes caulk ideal for sealing larger gaps in pipes or walls, while a plumber's putty can be used to fill smaller holes and cracks.

What is plumbers caulk used for?

Caulk is another plumbing material made from latex and a mix of acrylic ingredients. Caulk seals bathroom seams like the space where your shower meets the wall or where the sink counter meets the wall. It's also used in external settings to weatherproof homes. After drying, caulk remains firm, like dried glue.

When should you not use plumbers putty?

Plumbers' Putty: While it is also water-resistant, it is not suitable for areas that will be submerged in water for extended periods, as it can break down over time.

Why can't I use plumbers putty on plastic?

Plumbers putty is petroleum based and will degrade the plastic over time making it extremely brittle. Don't use it! Stick to the built in silicone seal.

Is plumbers caulk waterproof?

Plumbers caulk makes a flexible, durable, and UV resistant waterproof seal on interior and exterior surfaces. Will not crumble, resists shrinking, and can be painted.

This Silicone Trick Will Change the Way You Apply Silicone!

What is the best caulk to seal water?

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.

Does plumbers caulk stop leaks?

Limitations Of Caulk For Plumbing Repairs

While caulk can effectively seal certain types of leaks, it is not suitable for all plumbing repairs, especially those involving highly-pressurized water lines.

Can water get through plumbers putty?

Plumber's putty is a malleable, clay-like compound that creates a watertight seal by filling in the space under a flange to prevent water from seeping through.

Is it OK to use silicone instead of plumbers putty?

Both plumbers putty vs caulk silicone are sealing compounds. They're both designed to create a watertight fit for drains, fittings, showers, sinks strainers, and more. While plumbers putty is more traditional, silicone caulk is a great modern alternative. Either is acceptable for fixing a drain.

Why does plumbers putty fail?

If the putty is exposed to air for an extended period of time, it will harden and become brittle.

Do I need plumbers putty if I have a rubber gasket?

No. Plumbers putty is old school. Many plumbers use only the rubber gasket included with faucets, pop-ups and tub wastes. Plumbers putty is cheap but it will dry out and crack quicker than rubber gaskets.

How long should plumbers putty sit before getting wet?

How Long Does Plumber's Putty Take to Set? It takes a few hours for plumber's putty to set. You can use a drain or tap immediately after installing the putty, although waiting a few hours may yield the best results. The putty will expand so might create a tighter seal.

What is the best sealant for a bathroom sink drain?

1. Silicone Caulk: This stuff is waterproof, flexible, and really durable. Plus, it's resistant to mold and mildew. You'll see it used around sinks, bathtubs, and showers because it sticks well to surfaces like glass, metal, and ceramic.

Where should you not use caulking?

Avoid caulking any areas that can trap water or restrict its ability to escape. Water buildup anywhere in your bathroom can lead to the development of mold and mildew, and in some cases cause rotting around windows and doors.

What is the best caulk for the bottom of a toilet?

Silicone bathroom caulk tends to perform best for sealing toilets. It's water-resistant and flexible.

Does vinegar dissolve plumbers putty?

(If you do not have rubbing alcohol around your house, you can always use white vinegar too. This works just as well as the alcohol).

Should you caulk around a sink drain?

Sealing is an essential part of sink drain installation and maintenance because it keeps everything watertight. However, even the strongest sealant doesn't last forever. Over time, leaks and drips can become a problem. The most popular products for sealing kitchen sink drains are plumber's putty and silicone sealant.

What to use if you don't have plumbers putty?

But if you're looking for something that's easier to use than plumbers putty, then silicone caulk may be the better option. Either way, remember that caulking is only as good as its application.

Do people still use plumbers putty?

In the past, plumber's putty was used in many places where caulk is used today, but it's still the best (or even better) option for many situations. Learn how to use plumber's putty, its benefits, and where to use it.

Is it better to use plumbers putty or silicone?

If you're looking for something that will withstand frequent weather fluctuation and high moisture levels, silicone sealant might be the best option. On the other hand, if you need something to prevent the migration of water between two rigid surfaces, keeping your fixtures leak-free, plumber's putty is a smart choice.

Do you need gloves for plumbers putty?

Despite its ease of use, safety precautions must be taken when using plumber's putty. Always wear gloves while handling it to prevent direct contact with the skin, as it may cause irritation. After completing the task, ensure you clean your hands thoroughly to remove any residual putty.

Where not to use plumbers putty?

But you should not use it in places where you need adhesive strength. Plus it is not recommended to use in exposed areas needing a watertight seal. Plumbers putty for years has been the go-to product to use to create watertight seals between surfaces around faucets, sinks, and drains.

What caulk do plumbers use?

Hercules Plumbers Caulk is a commercial-grade, easy-to-use, single component, non-sag, siliconized acrylic-latex caulk. It forms a flexible, durable and UV-resistant waterproof seal on interior and exterior surfaces.

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