Product details
| Grade | Loctite EA 3471 |
| Strength | High strength |
| Colour | Grey, steel filled |
| Family | Metal repair epoxies & putties |
| 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 EA 3471 is for
A steel-reinforced two-part epoxy putty that cures to a metal-like finish — it can be machined, drilled, tapped or filed once hard. It will not sag or shrink, so it holds shape on a vertical face while it cures. At 61.7 N/mm² compressive strength it rebuilds worn parts without welding or hot work, which is what makes it useful where a naked flame is not allowed.
Key features
- Steel filled — cures to a machinable, metal-like finish
- Drill, tap, file or machine once cured
- Will not sag or shrink; 1.63% volume shrinkage
- 61.7 N/mm² compressive strength, 27.8 N/mm² tensile
- 82 Shore D hardness
- No heating or welding — safe where hot work is prohibited
- Service range −30°C to 105°C
- Working life 30 minutes; gel time 35–40 minutes at 21°C
Typical applications
- Worn shafts
- Casting repairs
Technical data
Uncured material
| Technology | Epoxy |
| Appearance (resin) | Grey |
| Appearance (hardener) | White |
| Appearance (mixed) | Grey putty |
| Mix ratio by weight | 6.25 : 1 resin to hardener |
| Mix ratio by volume | 2.5 : 1 resin to hardener |
| Cure | Room temperature after mixing |
| Application temperature | 15°C to 30°C |
| Resin density at 22°C | 2.43 g/ml |
| Hardener density at 22°C | 1.08 g/ml |
| Mixed weight per volume | 2.64–2.76 kg/L |
| Gel time at 21°C | 35–40 minutes |
| Working life | 30 minutes |
Cured mechanical properties
Cured at 25°C.
| Compressive strength (ISO 604) | 61.7 N/mm² (8,940 psi) |
| Compressive modulus (ISO 604) | 3,400 N/mm² |
| Tensile strength (ISO 527-2) | 27.8 N/mm² (4,040 psi) |
| Tensile modulus (ASTM D638) | 9,360 N/mm² |
| Flexural strength (ASTM D790) | 56.4 N/mm² (8,190 psi) |
| Flexural modulus | 3,500 N/mm² |
| Lap shear on grit-blasted mild steel (ISO 4587) | 9.6 N/mm² (1,395 psi) |
| Shore hardness (ISO 868, Durometer D) | 82 |
| Elongation (ISO 527-2) | 0.49% |
| Volume shrinkage | 1.63% |
| Abrasion resistance (ASTM D4060, CS-10, 1 kg) | 0.523 mg lost |
Thermal and electrical
| Glass transition temperature (ASTM E1640) | 60°C |
| Operating range | −30°C to 105°C |
| Coefficient of thermal expansion, below Tg | 43 × 10⁻⁶ K⁻¹ |
| Coefficient of thermal expansion, above Tg | 125 × 10⁻⁶ K⁻¹ |
| Volume resistivity (IEC 60093) | 1.1 × 10¹⁵ Ω·cm |
| Surface resistivity (IEC 60093) | 3.1 × 10¹⁵ Ω |
Coverage
| At 6 mm thickness | 278 cm² per 0.45 kg |
| Excludes over-thickness and repairs |
How to use it
- Remove dirt, oil and grease with a suitable cleaner — Henkel names Loctite SF 7840.
- Grit blast all surfaces to a profile depth of 75–100 microns and a cleanliness of Near White Metal (SIS SA 2½ / SSPC-SP 10).
- After blasting, clean with a waterless cleaner and coat before any oxidation occurs.
- Metal that has been in seawater should be grit blasted, high-pressure water blasted, then left 24 hours for salts to sweat to the surface. Test for chloride and repeat until below 40 ppm.
- Mix vigorously to a uniform colour. Force a thin layer deep into the surface texture first, then build up to the finished thickness immediately.
- Inspect for pinholes and misses just after application and again once cured.
- Clean tools with a Loctite solvent-based cleaner immediately; once cured it comes off only mechanically.
Handling and storage
- Relative humidity below 85%; ambient temperature above 15°C and rising.
- Substrate temperature must be at least 3°C above the dew point, or moisture condenses on the part.
- Working time and cure depend on temperature and mass — the larger the mixed quantity, the faster it goes off.
- To speed cure in the cold: store the epoxy at room temperature and pre-heat the repair surface until warm to the touch.
- To slow cure in the heat: mix in small masses and cool the components first.
- Store unopened and dry, ideally 8°C to 21°C; outside 8–28°C the properties can be affected.
EA 3471 or the Devcon putties?
EA 3471 and Devcon Plastic Steel Putty (A) do the same job — steel-filled, machinable, no hot work — and are close on compressive strength (61.7 against 57 N/mm²). We stock both, so the choice usually comes down to what your yard or client already specifies. Where a joint is smaller than a putty can reach, a retaining compound such as Loctite 660 covers gaps to 0.5 mm; beyond that, the epoxies take over. For a fast field patch rather than a machined rebuild, use EA 3463, which cures in ten minutes and works underwater.
Always read the current technical and safety data before use —
ask us and we'll send it with your quotation.
