🔧 Seal it like a pro—no leaks, no limits!
LOCTITE 577 is a medium-strength, heat and water-resistant thread sealant designed for metal pipes and fittings. It provides an instant low-pressure seal that won’t creep, shrink, or shred, curing fully in 24 hours. Trusted by professionals and DIYers alike, it offers excellent chemical and thermal resistance for durable, leak-proof connections.
| ASIN | B0087P1YT6 |
| Best Sellers Rank | 40,562 in DIY & Tools ( See Top 100 in DIY & Tools ) 196 in Universal Adhesives |
| Brand | Loctite |
| Colour | Amber |
| Compatible Material | Metal |
| Container Type | Tube |
| Country Of Origin | India |
| Customer Reviews | 4.6 out of 5 stars 182 Reviews |
| Full Cure Time | 24 Hours |
| Global Trade Identification Number | 04023055309122, 05010266577395, 05010266577449, 05010266577609 |
| Included Components | No |
| Item Form | Liquid |
| Item Package Quantity | 1 |
| Item Type Name | LOCTITE 577 |
| Item Volume | 50 Millilitres |
| Item Weight | 0.09 Kilograms |
| Item form | Liquid |
| Item height | 14.1 centimetres |
| Manufacturer | Henkel |
| Material | stainless steel |
| Model Number | 577 |
| Other Special Features of the Product | Heat Resistant |
| Special feature | Heat Resistant |
| Specific Uses For Product | Metal |
| Specific uses for product | Metal |
| Viscosity | medio |
| Water Resistance Level | Water Resistant |
G**M
Works well. Good value
Greay stuff. Used it to fix an outside tap. No leaks so far.
W**Y
Works well
Does exactly what it’s say on the package. It’s my first time using this product as I’m of the old school of boss white and hemp, but this product certainly does the job however it must be left for 24 hours before filling the system.
J**N
Excellent Product!
I have been successfully using this product for some time on radiator tails, metal to metal connections for shower arms and Grohe Rapido Roughing in boxes. I have also used it for outside garden taps (faucets if you are in the USA). It is not cheap but has always performed excellently.
M**.
Brilliant. Worth the cost.
Brilliant for sealing ½ inch bsp threads. Well worth the price.
N**.
Forget PTFE tape
Used for my airride system as I was having issues with PTFE tape, couldn’t be happier. With 150psi in my tank I’ve got no leaks even a year later!
A**.
Dependable
Excellent product, used for years both in an industrial and home setting. Ideal for sealing taper threads. Have experience using this product with NPT threads holding pressures up to 10k psi no problem as long as applied properly that is.
D**R
If you want to be sure it’s sealed
It’s more expensive than ptfe tape (a lot) but if you want to be certain it’s going to seal you will not find anything better. I have used it in situations it’s not approved for (high vacuum) and it has worked perfectly.
A**R
Quick delivery
Dose what it’s sold as
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