Product details
| Grade | Loctite 510 |
| Strength | Medium strength |
| Colour | Pink |
| 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 510 is for
The high-temperature anaerobic gasket. Where 573 and 574 are characterised to 150°C, 510 runs to 200°C — and its heat-ageing data is unusual: strength rises well above its starting value over thousands of hours at 150°C. It is the grade for rigid flange faces on transmissions and motor casings that run hot.
Key features
- High temperature — service range −10°C to 200°C
- Strength increases on heat ageing rather than falling away
- ≥7.5 N/mm² compressive shear after 24 hours
- Reaches ≥1 N/mm² in the first hour
- NSF registered Category P1 for food processing areas (a regional approval)
- Australian Gas Association certificate 2590 Class II, 500 kPa, −10 to 200°C
- Gains strength in water/glycol — 160% at 100 hours
- Cold strength tested to −75°C
Typical applications
- Engine flanges
- High temperature joints
Technical data
Uncured material
| Technology | Acrylic |
| Chemical type | Dimethacrylate ester |
| Appearance | Pink opaque paste |
| Components | One component — no mixing |
| Cure | Anaerobic; secondary cure by activator |
| Viscosity, Brookfield HBT 25°C | Spindle TC at 20 rpm, Helipath: 40,000–140,000 mPa·s |
| Viscosity at 2.5 rpm | 200,000–750,000 mPa·s |
| Viscosity class | High |
| Specific gravity at 25°C | 1.1 |
Instant sealing — pressure resistance before cure
Uncured product on a 50/70 mm annular assembly with a polycarbonate face.
| Induced gap | Pressure resistance |
|---|
| 0 mm | 0.02 MPa |
| 0.125 mm | 0.01 MPa |
| 0.25 mm | 0.01 MPa |
Strength
Cured at 22°C on degreased steel pins and collars.
| Compressive shear strength after 1 h (ISO 10123) | ≥1 N/mm² (≥145 psi) |
| Compressive shear strength after 24 h (ISO 10123) | ≥7.5 N/mm² (≥1,085 psi) |
| Lap shear strength, grit-blasted steel | 5 N/mm² (725 psi) |
| Tensile strength, grit-blasted steel (ISO 6922) | 7.5 N/mm² (1,085 psi) |
| Sealing capability, mild steel | Sealed to ≤0.125 mm gap at 1.3 MPa |
| Sealing capability, aluminium 2011T3 | Sealed to ≤0.125 mm gap at 1.3 MPa |
| Maximum gap | 0.25 mm |
| Cold strength | Tested to −75°C |
Chemical resistance
Effect of environment on strength, not a measure of sealing performance. Heat-ageing curves are published at 150°C and 185°C.
| Environment | °C | 100 h | 500 h | 1,000 h |
|---|
| Motor oil | 125 | 100% | 100% | 100% |
| Water / glycol 50:50 | 87 | 160% | 110% | 110% |
| Unleaded petrol | 22 | 95% | 60% | 60% |
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) |
| Service temperature | −10°C to 200°C |
| Hot strength plotted to | 200°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.
- Cured product softens with a Loctite solvent such as 7200 and can then be scraped off; finish with a cloth and Loctite SF 7063.
Loctite 510 or 574?
Both are anaerobic form-in-place gaskets for rigid metal flanges with gaps to 0.25 mm. The deciding factor is temperature: 510 is rated to 200°C and gains strength on heat ageing, while 573, 574 and 518 are characterised to 150°C. If the flange runs hot — transmission casing, motor housing, exhaust-side pump — specify 510. If it does not, 574 cures faster. For flanges that flex, or gaps beyond what an anaerobic can bridge, use the silicone SI 5927.
Always read the current technical and safety data before use —
ask us and we'll send it with your quotation.
