Product details
| Grade | Loctite 270 |
| Strength | High strength |
| Colour | Green |
| Family | Threadlockers |
| 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 270 is for
The green high-strength grade — permanent locking and sealing for heavy duty work such as studs into motor housings and nuts onto studs in pump housings. Low viscosity, so it wicks well into the thread. It cures on passive substrates including stainless and plated surfaces, and tolerates oil: cutting, lubrication and anti-corrosion fluids do not have to be cleaned off first.
Key features
- High strength — 33 N·m breakaway on M10, 90 N·m on M16
- Oil tolerant; works on stainless steel and plated surfaces
- Low viscosity — wicks into the thread
- NSF registered to Category P1 for use around food processing areas (a regional approval)
- 46 N·m breakloose on zinc phosphate after one week
- Heat needed for disassembly
Typical applications
- Permanent studs
- Pre-assembled fasteners
Technical data
Uncured material
| Technology | Acrylic |
| Chemical type | Dimethacrylate ester |
| Appearance | Green liquid |
| Fluorescence | Positive under UV light |
| Components | One component — no mixing |
| Cure | Anaerobic; secondary cure by activator |
| Viscosity, Brookfield RVT 25°C | Spindle 2 at 20 rpm: 500 mPa·s |
| Specific gravity at 25°C | 1.1 |
| Viscosity, cone & plate 25°C | 450 mPa·s at 129 s⁻¹ |
| Viscosity class | Low |
Torque by fastener size
Cured 24 hours at 22°C, unseated, ISO 10964.
| Fastener | Breakaway N·m (lb·in) | Prevail N·m (lb·in) |
|---|
| M6 steel nuts and bolts | 5 (45) | 3 (26) |
| M10 steel nuts and bolts | 33 (290) | 33 (290) |
| M16 steel nuts and bolts | 90 (800) | 125 (1,100) |
| 3/8 × 16 steel nuts and bolts | 31 (275) | 33 (290) |
Further torque and strength
| Breakloose torque, M10, pre-torqued to 5 N·m | 39 N·m (345 lb·in) |
| Prevail torque, M10 brass, pre-torqued | 25 N·m (220 lb·in) |
| Compressive shear strength (ISO 10123) | ≥9 N/mm² (≥1,350 psi) |
| Breakloose after 1 week, M10 zinc phosphate | 46 N·m (400 lb·in) |
| Breakloose after 1 week, M10 stainless steel | 30 N·m (265 lb·in) |
Chemical resistance
M10 zinc phosphate nuts and bolts unless stated, as a percentage of initial strength.
| Environment | °C | 500 h | 1,000 h | 5,000 h |
|---|
| Motor oil | 125 | 65% | 75% | 75% |
| Unleaded petrol | 22 | 90% | 95% | 95% |
| Brake fluid | 22 | 105% | 105% | 100% |
| Water / glycol 50:50 | 87 | 75% | 85% | 90% |
| Acetone | 22 | 95% | 95% | 100% |
| B100 bio-diesel | 22 | 100% | 100% | 110% |
| DEF (AdBlue®) | 22 | 110% | 115% | 140% |
| Sodium hydroxide 20% (stainless) | 22 | 75% | 65% | 55% |
How to use it
- Clean all threads, internal and external, with a Loctite cleaning solvent and allow to dry.
- Shake the bottle thoroughly before use.
- Do not let the nozzle touch metal — it makes the product cure in the tip.
- Thru holes: apply several drops onto the bolt at the nut engagement area.
- Blind holes: apply several drops down the internal threads to the bottom of the hole.
- Sealing: apply a 360° bead to the leading male threads, leaving the first thread free, and work it into the thread roots.
- Assemble and tighten to the specified torque within the fixture time.
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.
- On passive metals (stainless, aluminium, plated) or below 5°C, use Loctite SF 7471 or SF 7649 activator to bring the cure speed up.
- Store unopened and dry. Henkel gives optimal storage as 8°C to 21°C; outside 8–28°C the product properties can be affected.
- Do not return decanted product to the original container.
- Disassembly: apply localised heat to about 250°C and take the joint apart while hot — hand tools will not release a high-strength grade.
Loctite 270 or 271?
Both are high-strength grades needing heat to release, and both are low viscosity. 270 is the newer chemistry: oil tolerant, cures on stainless and plated threads without activator, and carries NSF P1 registration for use around food processing. 271 is the older red grade for clean steel threads up to M25. For larger bolts and studs above M25, step up to 277.
Always read the current technical and safety data before use —
ask us and we'll send it with your quotation.
