LOCTITE 577 Thread Sealant 50ml – Medium Strength Pipe & Thread Sealant
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LOCTITE 577 Thread Sealant 50ml is a professional-grade, medium-strength sealant designed for locking and sealing threaded metal pipes and fittings. Its thixotropic paste formula fills the space between threaded components, helping create a reliable seal while also helping secure the connection.
Designed for general plumbing, heating and pipework applications, LOCTITE 577 provides an immediate low-pressure seal and cures anaerobically once confined between close-fitting metal surfaces. It is suitable for both active and inactive metals and is formulated to tolerate minor surface contamination commonly encountered during installation.
Key Features
✅ 50ml Size – Convenient bottle for installation, repair and maintenance work
✅ Medium Strength – Designed to provide reliable sealing while allowing easier disassembly when servicing is required
✅ Thread & Pipe Sealant – Designed for threaded metal pipes and fittings
✅ Immediate Low-Pressure Seal – Helps seal the connection immediately after assembly
✅ Anaerobic Cure – Cures when confined between close-fitting metal surfaces
✅ Thixotropic Formula – Paste consistency helps keep the product in position during application
✅ Active & Inactive Metals – Suitable for a wide range of threaded metal fittings
✅ Temperature Resistant – Manufacturer-specified operating range of -55°C to +150°C
✅ Contamination Tolerant – Can cure in the presence of minor residues from cutting, lubrication and cleaning processes
✅ Chemical Resistant – Designed for demanding pipe-sealing applications
Ideal For
- Threaded metal pipe fittings
- Plumbing installations
- Heating systems
- Pipework repairs and maintenance
- New threaded pipe installations
- Stainless-steel and other metal fittings
- Professional trade applications
Specifications
| Specification | Details |
|---|---|
| Brand | LOCTITE |
| Product | 577 |
| Product Type | Pipe & Thread Sealant |
| Container Size | 50ml |
| Strength | Medium |
| Cure Type | Anaerobic |
| Physical Form | Paste |
| Colour | Yellow |
| Recommended Substrate | Metal threaded pipes & fittings |
| Operating Temperature | -55°C to +150°C |
| Maximum Gap Performance | Up to 0.25mm |
| Quantity | 1 x 50ml container |
Henkel specifies LOCTITE 577 for straight-to-straight and straight-to-taper threaded fittings and states gap performance up to 0.25mm.
Potable Water / WRAS Information
LOCTITE 577 has potable-water certification according to WRAS for applications used with LOCTITE SF 7649 activator. This condition is important and should be followed where WRAS-certified potable-water use is required.
What's Included?
📦 1 x LOCTITE 577 Thread Sealant – 50ml
A versatile professional thread sealant for creating dependable seals on threaded metal pipework while retaining medium-strength characteristics for easier future disassembly.