Best Plumber's Putty and Sealants (2026 Contractor Guide)
- Jul 9
- 4 min read
Every plumbing contractor knows that even the best fixtures and fittings can fail if they're sealed improperly. Whether you're installing a kitchen sink, setting a basket strainer, mounting a faucet, or sealing threaded connections, choosing the right sealing product is just as important as selecting quality fixtures.
The challenge is that not every job calls for the same material. Plumber's putty, PTFE thread sealant, pipe joint compound, and 100% silicone sealant all serve different purposes. Using the wrong one can result in leaks, callbacks, damaged surfaces, or premature failures.
This guide covers four contractor-trusted products that belong in every plumbing truck. These products have earned their reputation through years of reliable performance on residential and commercial jobs.
Best Plumber's Putty and Sealants for Contractors
Best Overall Plumber's Putty
Best for:
Sink basket strainers
Faucet installations
Pop-up drains
Kitchen and bathroom fixtures
The Hercules Sta Put Ultra has become one of the industry's favorite plumber's putties because it stays workable while providing a long-lasting watertight seal. Unlike cheaper putties that dry out quickly, this formula remains flexible, making future fixture removal much easier.
Pros
Long working time
Easy cleanup
Doesn't crack after installation
Trusted by professional plumbers
Cons
Not intended for pressurized joints
Should not be used on certain natural stone materials
Best Pipe Thread Sealant
Best for:
Threaded brass fittings
Black iron pipe
Water lines
Air lines
Natural gas applications (where approved)
It creates a reliable seal on threaded metal connections while lubricating threads for easier assembly. Contractors appreciate that it remains flexible after curing and performs well under varying temperatures.
Pros
Excellent leak prevention
Easy application
Suitable for numerous pipe materials
Long shelf life
Cons
Slightly messy if over-applied
Requires proper curing on some applications
Best Multi-Purpose Pipe Dope
Best for:
PVC
CPVC
Brass
Copper
Stainless steel
ABS threaded fittings
Oatey's Great White Pipe Joint Compound is one of the most versatile sealants available. It works across a wide range of piping materials and provides excellent lubrication during assembly.
Pros
Works on multiple pipe materials
Easy to apply
Professional-grade formula
Excellent thread lubrication
Cons
Brush can become messy during heavy use
Not a substitute for PTFE tape when specifications require both
Best Silicone Sealant
Best for:
Sink edges
Shower fixtures
Bathtubs
Countertops
Bathroom plumbing
Not every plumbing job should use plumber's putty. Silicone is often the better option for sealing exposed fixtures where waterproofing, flexibility, and mold resistance matter.
GE Advanced Silicone 2 offers excellent adhesion, mildew resistance, and long-term durability, making it a favorite among plumbing professionals.
Pros
Waterproof immediately after curing
Mold-resistant formula
Excellent flexibility
Strong adhesion
Cons
More difficult to remove than putty
Longer cure time
When Should You Use Plumber's Putty?
Plumber's putty works best anywhere two non-pressurized surfaces need a watertight seal.
Common applications include:
Sink basket strainers
Faucet bases
Sink drains
Pop-up assemblies
Kitchen sinks
Bathroom lavatories
Avoid using plumber's putty on:
Pressurized pipe joints
Plastic threads unless manufacturer-approved
Marble
Granite
Quartz
Natural stone surfaces that can stain
When Should You Use Silicone Instead?
Silicone is a better choice whenever flexibility and waterproof protection are required over time.
Examples include:
Around sink rims
Shower trim
Tub surrounds
Countertop joints
Areas exposed to constant moisture
Unlike plumber's putty, silicone cures into a permanent waterproof gasket.
Pipe Thread Sealant vs PTFE Tape
Many contractors use both together because each serves a different purpose.
PTFE Tape
Lubricates threads
Helps fittings tighten properly
Reduces galling
Pipe Joint Compound
Fills microscopic gaps
Creates a stronger seal
Prevents small leaks
Always follow manufacturer specifications. Some plumbing products recommend one product, while others recommend using both together.
How to Choose the Right Plumbing Sealant
When selecting a sealant, consider:
Material Compatibility
Some products are designed specifically for metal threads, while others work on PVC, CPVC, or brass.
Pressure Rating
Plumber's putty should never be used where water pressure is present.
Future Serviceability
If a fixture may need servicing later, products that remain flexible can simplify future repairs.
Moisture Exposure
Silicone generally performs better in constantly wet environments.
Common Mistakes Contractors Should Avoid
Even experienced plumbers occasionally encounter sealing issues. Avoid these common mistakes:
Using plumber's putty instead of silicone where manufacturers require silicone
Over-tightening fittings and squeezing out all sealing material
Applying excessive pipe dope
Forgetting to clean surfaces before installation
Mixing incompatible sealants
Ignoring manufacturer installation instructions
A few extra minutes during installation can prevent expensive callbacks later.
Why Quality Sealants Matter
The cost difference between budget sealants and professional-grade products is minimal compared to the expense of a return trip.
Professional contractors benefit from:
Fewer leaks
Reduced warranty claims
Faster installations
Greater customer satisfaction
Longer-lasting repairs
Keeping proven sealants stocked ensures your crew can complete virtually any installation with confidence.
Protect Your Plumbing Business Beyond the Jobsite
The right sealant protects your plumbing installation, but the right insurance protects your business.
Whether you're working on residential remodels, commercial plumbing systems, or emergency service calls, unexpected accidents can happen. General liability insurance, commercial auto coverage, workers' compensation, and contractor equipment insurance can help protect your business from costly claims.
At Wexford Insurance, we specialize in insurance solutions for plumbing contractors. Our team understands the risks plumbers face every day and can help you find coverage tailored to your business, whether you're an independent contractor or manage a growing plumbing company.
If you're looking for competitive coverage from multiple top-rated insurance carriers, contact Wexford Insurance for a free, no-obligation quote.
Frequently Asked Questions
Is plumber's putty waterproof?
Yes. Plumber's putty creates a watertight seal between fixtures but should only be used on non-pressurized applications.
Does plumber's putty harden?
Most professional plumber's putties remain soft and flexible, making future fixture removal easier.
Can plumber's putty replace silicone?
No. Silicone is better for exposed joints, wet environments, and installations requiring a permanent waterproof seal.
Should plumbers use PTFE tape and pipe dope together?
Many manufacturers recommend using both on threaded connections, but always follow the fitting manufacturer's installation instructions.
Which sealant lasts the longest?
High-quality silicone sealants generally provide the longest service life in wet environments, while professional pipe thread sealants offer decades of leak protection on properly installed threaded fittings.