Product details
| Grade | Loctite 574 |
| Strength | Medium strength |
| Colour | Orange |
| Family | Flange & gasket 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 574 is for
The fast-curing form-in-place gasket for rigid metal flanges. It seals close-fitting joints — gearbox and engine casings are the classic examples — and resists low pressure immediately after assembly, before it has cured. Four times the compressive shear of 573 at ≥6.0 N/mm², and it holds full strength in motor oil at 125°C to 1,000 hours.
Key features
- Fast cure — reaches working strength quickly
- ≥6.0 N/mm² compressive shear, four times the slow-cure grade
- 8.5 N/mm² lap shear on grit-blasted steel
- Resists low pressure immediately on assembly, before curing
- Thixotropic orange paste — will not migrate
- Gaps to 0.25 mm; cures down to 5°C
- 100% of initial strength in motor oil at 125°C after 1,000 hours
Typical applications
- Gearbox and pump flanges
- Engine covers
- Rigid metal joints
Technical data
Uncured material
| Technology | Acrylic |
| Chemical type | Dimethacrylate ester |
| Appearance | Orange paste |
| Fluorescence | Positive under UV light |
| Components | One component — no mixing |
| Cure | Anaerobic; secondary cure by activator |
| Viscosity, Brookfield RVT 25°C | Spindle 6 at 20 rpm: 23,000–35,000 mPa·s |
| Viscosity at 2.5 rpm | 70,000–120,000 mPa·s |
| Viscosity class | Thixotropic |
| Specific gravity at 25°C | 1.1 |
Strength
After 24 hours at 22°C.
| Compressive shear strength (ISO 10123) | ≥6.0 N/mm² (≥870 psi) |
| Lap shear strength, grit-blasted steel | 8.5 N/mm² (1,230 psi) |
| Tensile strength, grit-blasted steel (ISO 6922) | 5 N/mm² (725 psi) |
| Maximum gap | 0.25 mm |
Chemical resistance
Effect of environment on strength, not a measure of sealing performance.
| Environment | °C | 100 h | 500 h | 1,000 h |
|---|
| Motor oil | 125 | 100% | 100% | 100% |
| Water / glycol 50:50 | 87 | 85% | 85% | 85% |
| Petrol | 22 | 75% | 75% | 75% |
Cured material
| Coefficient of thermal expansion (ISO 11359-2) | 80 × 10⁻⁶ K⁻¹ |
| Thermal conductivity (ISO 8302) | 0.1 W/(m·K) |
| Specific heat | 0.3 kJ/(kg·K) |
| Heat ageing data published to | 150°C |
| Cures down to | 5°C |
How to use it
- Flange faces must be clean and free from grease.
- Designed for close-fitting flanged parts with gaps up to 0.25 mm.
- Apply as a continuous bead, a rolled film, or by screen printing to one flange face.
- For gaps over 0.125 mm using a pen roller, apply a rolled film to both faces.
- Low pressure may be applied to confirm the seal immediately after assembly, before curing.
- Tighten the flanges as soon as possible after assembly to avoid shimming.
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.
- Check compatibility if aqueous washing systems are used before bonding; some washes affect the cure.
- 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.
Choosing a flange sealant
574 is the fast, medium-strength default for rigid metal flanges. 573 is the slow-cure, low-strength version for large flanges that take time to bolt up. 518 tolerates oil and surfactant contamination and cures on low-copper aluminium, but is poor in petrol. 510 is the high-temperature grade. SI 5927 is a silicone — use it where the flange flexes or the gap is larger than an anaerobic can bridge.
Always read the current technical and safety data before use —
ask us and we'll send it with your quotation.
