Loctite 416 Super Bonder Instant Adhesive 25ml

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)
• Listed 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

Selecting 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 5 mm, see Loctite 3090 - Two Component Gel - 10g.

Using it

Henkel says the product suits thin bond gaps (0.05 mm). Thinner bond lines cure faster and larger gaps slow the cure.

Fixture times in the Henkel data sheet 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.

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. The Henkel data sheet states no operating temperature range; the hot strength graph runs from -50 °C to 150 °C. Read the safety data sheet before use.

Frequently asked questions

How fast does Loctite 416 fixture?

At 22 °C and 50% RH: under 5 s on neoprene and nitrile rubber, 10 to 30 s on aluminium, 20 to 50 s on degreased mild steel and 40 to 100 s on zinc dichromate.

How strong is Loctite 416?

After 24 hours at 22 °C, lap shear is 18 to 26 N/mm² on grit-blasted steel and 12 to 19 N/mm² on etched aluminium.

What approvals does Loctite 416 list?

Mil-A-46050C (tested to the lot requirements) and Commercial Item Description A-A-3097 (qualified). Henkel notes both are regional approvals; contact your local Technical Service Center for clarification.

What bond gap suits Loctite 416?

Henkel says it suits thin bond gaps (0.05 mm). The data sheet gives no gap-fill figure.

How does Loctite 416 hold up against fuel and solvents?

After 1,000 hours it keeps 100% of its initial strength in gasoline, isopropanol and ethanol, and 95% in motor oil at 40 °C.

How should Loctite 416 be stored?

Unopened and dry at 2 °C to 8 °C. Storage outside this range can affect its properties.

Related products

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, Loctite 410 Black Toughened Instant Adhesive 20g.