Can this be used on natural gas grill orifices?

No. Heat is used to loosen this sealant. Use pipe dope.

Is this compatible with propane lines?

It should be I never used it I did used it on auto gas systems which are a propane mix

Would I need to use the 7649 primer if I was screwing a brass fitting (active metal) into a stainless steel (inactive metal)?

Actually I would recommend anti-seize compound. This will lock the thread where anti-seize will prevent reaction between dissimilar metals

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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577 Thread Sealant 50 mL Tube

Product ID: 45059808

Details

Brand
Loctite
Item Weight
0.07 Pounds
Item dimensions L x W x H
1 x 1 x 1
Material
Polymer-based
Style
Compact

🔧Medium-strength sealant

⏱️Instant low-pressure seal

❄️Fast cure at low temps

136 zł

Duties & taxes included

In stock

Sold byAmazon PolandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Poland.

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Description

🔩 Lock it down instantly, no leaks allowed!

GEL LIKE FORMULA - Minimizes migration and mess after application
COLD WEATHER READY - Fast curing even in low-temperature environments
SEAL LOCK IN ONE STEP - Combines sealing and locking for secure metal threads
CHEMICAL THERMAL RESILIENCE - Stands strong against harsh chemicals and heat
VERSATILE METAL COMPATIBILITY - Works flawlessly on all metal types without primers

Loctite 577 is a medium-strength, general-purpose thread sealant designed for metal pipes and fittings. It provides an instant low-pressure seal, cures quickly even on lightly contaminated surfaces without primers, and offers excellent chemical and thermal resistance with minimal product migration.

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136 zł

Duties & taxes included

In stock

Sold byAmazon PolandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Poland.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Rajesh P.

Customer service was outstanding when I had questions about the product.

2 days ago

Ayesha M.

The product exactly matches the description. Very satisfied with my purchase.

5 days ago

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577 Thread Sealant 50 mL Tube

Details

Details

Description

Specifications

Common Questions