Product details
| Grade | Loctite 572 |
| Strength | Low strength |
| Colour | White |
| Family | Thread sealants |
| Brand | Loctite (Henkel) |
| Stock | Held in Dubai — buy one or bulk |
Pack sizes
Prices on request. Tell us the quantity you need.
Check stockWhat Loctite 572 is for
A white, thixotropic thread sealant for metal pipes and fittings. Low compressive shear at 0.5 N/mm² means it seals without effectively locking the joint — the fitting still comes apart easily later. Being thixotropic, it stays where it is applied instead of running down the thread.
Key features
- Seals without locking — easy disassembly with hand tools
- Thixotropic: resists migration after application
- 20 N·m breakloose on M10 pre-torqued fasteners
- Full strength retained in brake fluid to 1,000 hours
- Heat ageing data published to 150°C
- One component, cures anaerobically
Typical applications
- Coarse threads
- Large fittings
Technical data
Uncured material
| Technology | Acrylic |
| Chemical type | Dimethacrylate ester |
| Appearance | White to off-white paste |
| Components | One component — no mixing |
| Cure | Anaerobic; secondary cure by activator |
| Viscosity, Brookfield RVT 25°C | Spindle 6 at 20 rpm: 14,400–28,600 mPa·s |
| Viscosity at 2.5 rpm | 28,800–77,000 mPa·s |
| Specific gravity at 25°C | 1.25 |
Torque and strength
After 24 hours at 22°C.
| Breakaway torque, M10 steel | 7 N·m (60 lb·in) |
| Prevail torque, M10 steel | 3 N·m (30 lb·in) |
| Breakloose torque, pre-torqued to 5 N·m | 20 N·m (180 lb·in) |
| Max. prevail torque, pre-torqued to 5 N·m | 20 N·m (180 lb·in) |
| Compressive shear strength (ISO 10123) | 0.5 N/mm² (70 psi) |
Chemical resistance
As a percentage of initial strength after ageing.
| Environment | °C | 100 h | 500 h | 1,000 h |
|---|
| Motor oil (MIL-L-46152) | 125 | 75% | 70% | 70% |
| Leaded petrol | 22 | 95% | 95% | 95% |
| Brake fluid | 22 | 100% | 100% | 100% |
| Water / glycol 50:50 | 87 | 90% | 80% | 55% |
| Ethanol | 22 | 90% | 90% | 90% |
| Acetone | 22 | 85% | 85% | 75% |
Cured material
| Coefficient of thermal expansion (ISO 11359-2) | 80 × 10⁻⁶ K⁻¹ |
| Thermal conductivity (ISO 8302) | 0.1 W/(m·K) |
| Heat ageing data published to | 150°C |
How to use it
- Clean all surfaces, external and internal, with a Loctite cleaning solvent and allow to dry.
- On inactive metals, or if the cure is too slow, spray with Loctite SF 7471 or SF 7649 activator and allow to dry.
- Apply a 360° bead to the leading threads of the male fitting, leaving the first thread free.
- Force the material into the thread roots to fill the voids. On larger threads, apply a 360° bead to the female threads as well.
- Assemble and wrench-tighten in line with the fitting manufacturer's recommendations.
- A properly tightened fitting seals instantly to moderate pressure; allow 24 hours for maximum pressure and solvent resistance.
Handling and storage
- Not recommended for pure oxygen or oxygen-rich systems.
- Not a sealant for chlorine or other strong oxidising materials.
- Not normally recommended on plastics — thermoplastics can stress-crack.
- Disassembly is with standard hand tools; over 1 in. diameter or long engagement may need localised heat to about 250°C.
- Store unopened and dry, ideally 8°C to 21°C; outside 8–28°C the properties can be affected.
- Do not return decanted product to the original container.
Loctite 572 or 567?
Both are low-strength sealants that leave the joint serviceable. 567 adds high lubricity to prevent galling on stainless, and carries NSF 61 potable water certification plus UL and ULC gas classifications. 572 is the simpler general-purpose paste. If the threads are stainless or the line is potable water or gas, specify 567.
Always read the current technical and safety data before use —
ask us and we'll send it with your quotation.
