NSF61 Pipe Joint Compound – Slow-Dry, Non-Settling, Lead-Free Sealant for Metal & Plastic Threads, -50°F to 400°F, Ideal for PVC & Stainless Steel

Pipe Joint Compound NSF61 – Slow-Dry, Non-Settling, Lead-Free for Metal & Plastic, -50°F to 400°F, Ideal for Stainless Steel & PVC Connections

Professional-Grade Sealant for Leak-Free Performance on Every Connection

Upgrade your pipe installations with our Premium Pipe Joint Compound, engineered for both versatility and reliability across a wide range of piping materials. This slow-drying, non-settling compound ensures a long-lasting, secure seal on threads, making it ideal for both initial installations and routine maintenance. NSF/ANSI 61 certified and completely lead-free, it's a trusted solution for plumbers, contractors, and facility managers working with everything from PVC to stainless steel.

Key Features: Pro-Grade Sealant for Demanding Applications

• Slow-Drying, Non-Hardening Formula: Provides ample working time for complex or multi-joint assemblies, preventing premature setting.

• Multi-Material Compatibility: Seals threads on all metal types (including stainless steel) and a broad range of plastics like ABS, PVC, CPVC, and Nylon.

• Extreme Temperature Performance: Stays effective from -50°F to 400°F (-46°C to 204°C), making it perfect for hot and cold water systems.

• NSF/ANSI 61 Certified: Safe for use in potable water applications—ensures compliance and peace of mind.

• Two Convenient Sizes:

  • 2 oz (59 ml) tube – great for quick fixes and tight spaces.

  • 8 oz (237 ml) can – includes a dauber applicator for larger jobs and easy use on-site.

Commonly Used With Stainless Steel Installations

This product is frequently paired with our [Stainless Steel Fittings Collection →], which includes tees, elbows, couplings, nipples, and more. The compound’s high-performance formula helps prevent galling and ensures a strong, leak-free seal on stainless steel threads.

For the best possible seal, we recommend combining this compound with our [Stainless Thread Seal Tape →], especially in stainless steel applications where additional sealing and lubrication are essential.

Not sure this is the right sealant for your project? Check out our selection of [Thread Sealants →] to view more options.

Boost Performance and Reliability with the Right Sealant

Ensure your plumbing and mechanical connections stay secure with the Pipe Joint Compound that professionals trust. Whether you're sealing stainless steel, PVC, or mixed materials, this lead-free, certified compound provides unmatched performance from install to long-term operation. Get it right the first time—choose our NSF61 Pipe Joint Compound.

Frequently Asked Questions – NSF61 Pipe Joint Compound

What types of materials is this pipe joint compound compatible with?

This compound works on all metal types—including stainless steel—and a wide range of plastics such as PVC, CPVC, ABS, and Nylon. It’s engineered for mixed-material assemblies and performs reliably on both hot and cold water systems.

Is this joint compound safe for potable water?

Yes. It is NSF/ANSI 61 certified, meaning it is approved for use on drinking water systems and meets strict safety requirements for water-contact applications.

Does the compound harden over time?

No. It uses a slow-drying, non-hardening, non-settling formula, which ensures it stays pliable and maintains sealing performance long-term. This also prevents premature setting during assembly.

Can I use this pipe joint compound on stainless steel?

Absolutely. It is specifically recommended for stainless steel because it helps prevent thread galling and creates a reliable, leak-free seal. For optimal performance, pair it with Stainless Thread Seal Tape.

What temperature range can it handle?

This compound remains effective from –50°F to 400°F (–46°C to 204°C), making it suitable for hot water, cold water, and many industrial systems.

Is this product lead-free?

Yes. The formula is 100% lead-free, making it safe for potable water installations and compliant with modern building codes.

How long does the compound take to dry?

It is intentionally slow-drying to allow extra working time for multi-joint assemblies. Final cure time varies depending on temperature, pipe material, and system pressure.

Do I still need thread seal tape?

For most plastic and metal threads, the compound alone provides a strong seal.
For stainless steel connections, combining it with Stainless Thread Seal Tape is recommended to maximize sealing strength and prevent galling.

Can this compound be used on gas lines?

This specific product is formulated and certified for water and mechanical systems, not gas service. Check local codes and refer to our Thread Sealants category for approved gas-rated products.

What sizes are available?

You can choose from:

• 2 oz tube – ideal for tight spaces and small repairs

• 8 oz can with dauber – perfect for larger jobs and on-site work

Will it separate or settle in the container?

No. The non-settling formulation means it stays consistent even after long storage. Stirring is not required.

Can it be used on high-pressure systems?

Yes, the compound is designed for professional-grade performance in residential, commercial, and industrial pressure systems when applied properly.