Loctite® 496 Cyanoacrylate Adhesive

Loctite 496 cyanoacrylate adhesive: features, applications, and performance

Loctite 496 is a cyanoacrylate adhesive designed for demanding industrial assemblies: plastics, rubbers, elastomers, and metals. It sets in seconds, with no mixing required.

Its ethyl cyanoacrylate-based formulation allows it to bond where conventional cyanos fail, acidic surfaces, slightly oily surfaces, and low surface energy materials.

With a shear strength of up to 25 MPa on steel and a temperature resistance of -55 °C to +80 °C, this adhesive provides lasting durability, even in harsh environments.

Dagobert Industrie offers Henkel's Loctite 496 to professionals who cannot afford an assembly failure.

What is Loctite 496 cyanoacrylate adhesive?

Loctite 496 is an instant adhesive based on ethyl cyanoacrylate, formulated by Henkel for the rapid bonding of difficult-to-assemble materials.

It polymerizes in seconds upon contact with ambient humidity. No mixing, no prep time: apply, assemble, and it's bonded.

At Dagobert Industrie, we offer it to professionals seeking a high-performance adhesive for demanding industrial applications.

Composition and cyanoacrylate technology

Cyanoacrylates are single-component adhesives that do not require a hardener. The reaction is triggered by hydroxyl ions present in surface moisture.

Loctite 496 uses an ethyl-based formula, which provides good resistance to shocks and vibrations. This distinguishes it from methyl formulas, which are more rigid and brittle.

It is particularly suitable for plastic and rubber surfaces, including hard-to-bond elastomers such as EPDM or nitrile.

Product	Manufacturer	Chemical base	Impact resistance	Main applications
Loctite 496	Henkel	Ethyl	High	Plastics, elastomers, rubbers
Loctite 406	Henkel	Ethyl (+ integrated primer)	Medium	Difficult plastics, PTFE
Loctite 401	Henkel	Ethyl	Medium	General purpose multi-material
Permabond 105	Permabond	Methyl	Low	Metals, rigid surfaces

What is Loctite 496 used for? Application areas

Loctite 496 is a high-performance cyanoacrylate adhesive designed to bond materials that are difficult to join. It is suitable for both active surfaces and inert substrates.

Its special formulation allows it to polymerize rapidly even on materials with low surface energy, where traditional cyanoacrylate adhesives fail.

Bonding metals and difficult surfaces

Loctite 496 excels on metals, rubbers, rigid plastics, and elastomers. It is particularly well-suited for industrial assemblies subject to mechanical stress.

The main application areas are:

• Automotive industry: fixing seals, sensors, plastic parts
• Electronics: bonding components on PCBs, fixing wires
• Medical industry: assembly of instruments and devices
• Industrial maintenance: rapid repair of metal or plastic parts
• Rubber and elastomers: bonding seals, profiles, EPDM parts

Compared to Loctite 401 (general purpose) or Loctite 406 (optimized for porous plastics), the 496 stands out for its ability to adhere to oily or slightly contaminated surfaces.

Product	Viscosity	Target substrates	Key strength
Loctite 496	Low	Metals, rubbers, plastics	Difficult / oily surfaces
Loctite 401	Low	General purpose	All-material versatility
Loctite 406	Low	Plastics, porous rubbers	Ultra-fast polymerization
Loctite 480	High	Rubbers, rough surfaces	Shock and vibration resistance

Technical properties and performance of Loctite 496

Loctite 496 is a single-component medium-viscosity cyanoacrylate adhesive designed for the rapid assembly of hard-to-bond materials.

Its ethyl cyanoacrylate-based formulation gives it excellent adhesion to metals, rubbers, plastics, and elastomers. It polymerizes on contact with ambient humidity, without the need for heat or UV light.

Shear strength reaches up to 20 MPa on steel. The cured joint withstands continuous temperatures from -55 °C to +80 °C.

The fixture time is very short: 10 to 30 seconds on most substrates. Full strength is achieved within 24 hours.

Summary of strengths:

• Viscosity: ~500 mPa·s, fills gaps up to 0.15 mm
• Good chemical resistance to oils and mild solvents
• Compatible with EPDM, NBR, neoprene, and most engineering plastics
• Complies with common industrial requirements

Product	Viscosity (mPa·s)	Max. temp.	Main usage
Loctite 496	~500	+80 °C	Rubbers, plastics, metals
Loctite 495	~5	+80 °C	Smooth surfaces, very tight gaps
Loctite 480	~2000	+80 °C	Rubbers, porous surfaces
Permabond 731	~100	+120 °C	High-temperature assemblies

The 496 is positioned between a standard liquid cyanoacrylate and a gel. It is the right choice when surfaces are slightly irregular or porous.

Loctite 496 vs. other cyanoacrylate adhesives: comparison table

Loctite 496 is not the only cyano on the market. Here is how it compares to other common references.

Product	Viscosity	Tensile strength	Target materials	Key strength
Loctite 496	Low (liquid)	High (~25 MPa steel)	Metals, plastics, elastomers	Superior chemical and thermal resistance
Loctite 406	Very low	Medium	Rubbers, difficult plastics	Bonding inert materials with primer
Loctite 401	Medium	High	General purpose all materials	Maximum versatility
Henkel Bonderite CA-40	Low	Medium-high	Metals, rigid plastics	Good performance/cost ratio
3M Scotch-Weld CA40	Low	Medium	Plastics, composites	Compatible with 3M industrial processes

Loctite 496 stands out for its resistance to oils, solvents, and high temperatures. A decisive advantage in demanding industrial environments.

Loctite 401 remains more versatile for everyday use. But as soon as conditions become harsh, the 496 takes the lead.

At Dagobert Industrie, we recommend the 496 for assemblies exposed to fluids or repeated thermal cycling.

Precautions and safety instructions (CLP)

Loctite 496 is a cyanoacrylate adhesive. It reacts quickly, bonds skin in seconds, and releases irritating vapors. Work must be conducted methodically.

Wear nitrile gloves and safety glasses before handling. In case of skin contact, do not pull: use warm soapy water or a suitable solvent (acetone).

Work in a well-ventilated space. Cyanoacrylate vapors irritate the respiratory tract and eyes. In confined spaces, wear a mask with a filter cartridge.

In case of eye contact, rinse thoroughly with clear water for at least 15 minutes and seek medical advice immediately. Never attempt to force apart eyelids that have been bonded.

Keep the product out of reach of children, in its original packaging, away from heat and moisture. Ambient heat and humidity accelerate polymerization and degrade unused product.

Main associated CLP pictograms:

• ⚠️ Warning, irritant to skin and eyes
• 🔥 Flammable, low flash point, keep away from heat sources
• ⚕️ Harmful, vapors irritating to the respiratory tract

Consult the complete Safety Data Sheet (SDS) before any professional use. It details required PPE, exposure thresholds, and emergency procedures.

FAQ - Loctite 496

1. What is the difference between Loctite 496 and Loctite 495?

Loctite 496 is formulated for acidic surfaces, such as certain plastics and rubbers that inhibit the polymerization of conventional cyanoacrylates. Loctite 495 is a standard, general-purpose cyanoacrylate adhesive suitable for neutral surfaces.

2. Does Loctite 496 bond metal?

Yes. It effectively bonds metals to one another or to other materials. It is particularly suitable for metal-to-rubber and metal-to-plastic assemblies, which are common in industry.

3. What is the setting time of Loctite 496?

The fixture time varies depending on the material and the gap between parts. On rubber, it can range from a few seconds to one minute. On less reactive surfaces, allow up to 3 minutes. Maximum strength is reached after 24 hours.

4. Is Loctite 496 heat-resistant?

It withstands temperatures up to 80 °C continuously, with peaks tolerated at 120 °C for short durations. For high-temperature applications, Loctite offers other references such as Loctite 4014, which is resistant up to 120 °C continuously.

5. Can Loctite 496 be used on EPDM or silicone?

On EPDM, Loctite 496 yields good results thanks to its formulation adapted for acidic surfaces. On silicone, standard cyanoacrylates bond poorly. A primer or a specific silicone adhesive would be more suitable in that case.

6. How should Loctite 496 be stored to maintain its shelf life?

Keep the bottle tightly sealed, away from moisture, and at a temperature between 2 °C and 8 °C (refrigerator). At Dagobert Industrie, we recommend not leaving the bottle open for more than a few seconds to prevent premature polymerization.