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. But should plumbers rely on silicone over other types of sealant? And what else should they know about this material before jumping in?

Silicone Sealant vs. Plumbers Putty

So should you use plumbers putty or silicone when patching things up? Here’s a quick breakdown of the differences between the two.

Silicone Sealant

Silicone sealant is an adhesive made from silicone polymers. It offers exceptional waterproof qualities and is an ideal choice for sealing joints and leaks in areas exposed to moisture, such as bathrooms and kitchens.

Plumbers Putty

Plumbers putty is a soft, pliable sealing compound used for sealing joints to prevent water leaks. Unlike silicone sealant, putty remains somewhat flexible after installation, allowing for adjustments. It’s primarily used for sealing the bases of faucets, drains, and other fixtures to countertops and sinks.

When to Use Each

Determining when to use silicone vs. putty can be tricky, considering the two are alike in so many ways. Here’s a more in-depth look at the best use cases for each.

Silicone Sealant: The Go-To For Waterproofing and Flexibility

Silicone is a prime sealing candidate for a number of reasons. First, it’s extremely waterproof and, when applied correctly, practically guarantees a durable, leak-proof barrier. It’s also highly resistant to temperature extremes. This material can withstand very hot and very cold temperatures without cracking or becoming brittle. It also comes in mildew-resistant formulations, which are ideal for areas that have a lot of humidity.

Another great thing about silicone is that it adheres well to a wide range of materials — you aren’t limited to one or two types of surfaces. It can be used with everything from metal to ceramic.

But the sealant’s permeance can be a double-edged sword. It can be a pain to remove, especially from materials like glass, and is thus less than ideal in situations where temporary seals are needed or where surfaces may need to be separated or adjusted in the future.

Silicone sealant is generally best:

• In areas continuously exposed to water (e.g. showers and bathtubs).
• For sealing around pipes that experience major temperature fluctuations.
• On materials requiring a strong, waterproof adhesive bond, such as glass.
• In outdoor settings where weather resistance is a must.
• Where a clear or aesthetically pleasing finish is desired.

Plumbers Putty: An Excellent Choice For The Short-Term

If you’re working in an area where a water-resistant (but not necessarily waterproof) seal is required and future adjustments or disassembly are likely, you’re probably better off using putty. This material features a non-hardening, clay-like consistency and is perfect for creating seals that can be easily manipulated or removed.

Plumber’s putty should not be used in areas subject to direct water pressure or where a completely waterproof seal is essential. Its main role is to prevent water from leaking out from beneath fixtures into areas where it could cause damage. This makes it unsuitable for sealing cracks that will be immersed in water or exposed to large amounts of moisture over time.

Use plumber's putty:

• Under faucets, drains, and sink strainers.
• For applications where seals may need to be adjusted or removed.
• On non-porous surfaces where water resistance is needed.
• When immediate use of the fixture is necessary (as putty doesn’t require curing time).
• In settings where the material’s compatibility is a non-issue.

The Importance of Choosing High-Quality Products

Whether you decide to go with plumber’s silicone sealant or putty, it’s important to choose quality products designed to last. Don’t just think about the immediate application — though ease of use and application are certainly important — but the product’s composition, brand reputation, and performance characteristics.

The best silicone sealants are typically characterized by a high level of durability and resistance to mold and mildew. They should also be capable of maintaining elasticity and adhesion over time. Look for specially formulated products for plumbing, as these are more likely to tolerate high-moisture environments.

You might also browse customer reviews to get a feel for product quality. Choose well-known or otherwise reputable brands. See what features other buyers appreciate about the product — and what they’re dissatisfied with. While each plumber’s needs are unique, this can give you an idea of what to expect from the product.

As with any product, price does matter, but it shouldn’t be the determining factor in your decision. Remember, the cheapest products aren’t necessarily the best products — and vice versa — so be sure to balance your needs and expectations within budget while remaining flexible.

Silicone Depot offers quality silicone sealants at affordable prices, with bulk discounts available. We offer RTV sealants, waterproof sealants, and more. Check out our offerings or call us at 812-824-8000 to learn more about our products and how they can help with your plumbing needs.