Loctite 416 Super Bonder Instant Adhesive 25ml
Available
Loctite 416 is a one-part, high viscosity ethyl cyanoacrylate instant adhesive. It is a transparent clear liquid that cures with moisture, needs no mixing, and is a general purpose grade for plastics, rubbers and metals.
At 22 °C and 50% RH it fixtures in under 5 seconds on neoprene and nitrile rubber and in 20 to 50 seconds on degreased mild steel. It suits thin bond gaps.
Where this product is used
- General purpose bonding of plastics, rubbers and metals
- Rubber parts such as neoprene and nitrile bonded to metal
- Plastics such as ABS, PVC, polycarbonate and phenolic
- Aluminium and steel assemblies with thin bond lines
Features
- One part, no mixing
- High viscosity: 1,150 to 1,500 mPa·s (Brookfield LVF, 25 °C)
- Humidity cure, full chemical and solvent resistance after at least 24 hours
- 18 to 26 N/mm² lap shear on grit-blasted steel (24 h at 22 °C, ISO 4587)
- Softening point of 165 °C (DIN EN 1427)
- Approved to Mil-A-46050C (tested to the lot requirements) and Commercial Item Description A-A-3097 (qualified), both regional approvals
- Transparent clear liquid
Key specifications
| Specification | Detail |
|---|---|
| Brand | Loctite |
| Chemical type | Ethyl cyanoacrylate, one part |
| Colour | Transparent clear liquid |
| Cure | Humidity (moisture) cure |
| Viscosity (Brookfield LVF, 25 °C, spindle 2, 12rpm) | 1,150 to 1,500 mPa·s |
| Viscosity (cone and plate, 25 °C, 100 s⁻¹) | 900 to 1,500 mPa·s |
| Specific gravity (25 °C) | 1.05 |
| Fixture time (time to 0.1 N/mm² shear, 22 °C, 50% RH) | Mild steel (degreased) 20 to 50 s; aluminium 10 to 30 s; zinc dichromate 40 to 100 s; neoprene and nitrile under 5 s; ABS 15 to 40 s; PVC 20 to 50 s |
| Lap shear, grit-blasted steel (ISO 4587, 24 h at 22 °C) | 18 to 26 N/mm² |
| Lap shear, etched aluminium (same conditions) | 12 to 19 N/mm² |
| Tensile strength (ISO 6922, steel) | 12 to 25 N/mm² |
| Softening point (DIN EN 1427) | 165 °C |
| Storage | 2 °C to 8 °C, unopened, dry |
Choosing the right option
Loctite 416 is a high viscosity general purpose grade. For a thin, low viscosity grade aimed at plastics and rubbers, see Loctite 406 Instant Adhesive for Plastics and Rubbers; for a rubber-toughened grade, see Loctite 435 Toughened Instant Adhesive 25ml.
Where the bond gap varies up to 5mm, see Loctite 3090 - Two Component Gel - 10g.
See also: Loctite 401 Instant Adhesive, Loctite 406 Instant Adhesive for Plastics and Rubbers, Loctite 435 Toughened Instant Adhesive 25ml, Loctite 424 Instant Adhesive for Plastic & Rubber 25ml.
Using it
The product suits thin bond gaps (0.05mm). Thinner bond lines cure faster and larger gaps slow the cure.
Fixture times are the time to 0.1 N/mm² shear at 22 °C and 50% RH, and vary by substrate.
Full chemical and solvent resistance takes at least 24 hours.
After 1,000 hours it keeps 100% of its initial strength in gasoline, isopropanol and ethanol, and 95% in motor oil at 40 °C.
Storage and handling
Store unopened, in a dry place, at 2 °C to 8 °C. Storage outside this range can affect the properties of the product.
Limits and safety
Not recommended for pure oxygen or oxygen-rich systems, or as a sealant for chlorine or other strong oxidising materials. Read the safety data sheet before use.
Both are regional approvals; contact your local Technical Service Center for clarification.
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