Loctite 406 superglue thin 20g type

LOCTITE 406 — low viscosity cyanoacrylate adhesive

LOCTITE 406 is a one-component, low viscosity cyanoacrylate-based instant adhesive designed for rapid bonding in very small bond gaps. The product provides an ultra-thin adhesive film and is formulated for bonding plastics and elastomeric substrates, including EPDM and other rubber types.

Function and properties

• Technology: ethyl cyanoacrylate (one-component, moisture-curing)
• Appearance (uncured): transparent, colorless to straw-colored
• Low viscosity: typically around 20 mPa·s (datasheet specifies 12–22 mPa·s)
• Fast curing: fixture time on steel (degreased) specified as 20–45 seconds
• Curing is initiated by ambient humidity; full functional strength typically develops over a minimum of 24 hours

Application method (brief)

Technical guidance from the manufacturer states that surfaces should be clean and grease-free prior to application. Primer can be used on low-energy plastics to improve adhesion; activator can be used for larger joint gaps to increase curing speed. The manufacturer's complete instructions should be followed to achieve predictable results.

Typical applications

LOCTITE 406 is specified for bonding plastics and elastomers where very fast curing is required. The product is suitable for applications with very small bond gaps, as the formulation forms an ultra-thin adhesive film.

Technical documentation

See datasheet from the manufacturer

Specifications

• Product name: LOCTITE 406
• Manufacturer: LOCTITE (Henkel)
• Product number: 1921062
• Chemical type: Ethyl cyanoacrylate
• Viscosity: 12–22 mPa·s (typically ~20 mPa·s)
• Fixture time on steel (degreased): 20–45 seconds
• Operating temperature range: −40 °C to 120 °C
• Appearance (uncured): Transparent, colorless to straw-colored
• Key substrates: Plastics and rubbers (incl. EPDM and other rubber types)
• Curing mechanism: Moisture-initiated (one-component)
• Fully developed strength: typically at least 24 hours (depends on bond gap, materials, and environment)
• Optimal storage (specified in TDS): 2 °C to 8 °C

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