PERMABOND 4C20

Harmonization Code : 3506.10.00.00 | Prepared glues and other prepared adhesives, not elsewhere specified or included; products suitable for use as glues or adhesives, put up for retail sale as glues or adhesives, not exceeding a net weight of 1 kg

PERMABOND 4C20

Main features

  • 400 to 600 mPa s Viscosity Range
  • 10-Second Fixturing Time
  • 25 kV/mm Dielectric Strength

Product Description

PERMABOND® 4C20 Medical Device Grade Cyanoacrylate Adhesive is a single-component, intermediate-viscosity ethyl cyanoacrylate adhesive developed for rapid bonding across small to intermediate gaps. Its 400–600 mPa·s viscosity supports controlled manual or automated dispensing, while a maximum gap fill of 0.25 mm accommodates less tightly fitted components. The adhesive is suitable for plastics, rubber, and metals and typically reaches handling strength in approximately 10 seconds on steel, Buna N rubber, and phenolic. Full strength develops in 24 hours. After cure, it provides high steel shear strength, 85 Shore D hardness, and useful electrical insulation properties.

Key features

  • Intermediate viscosity: A viscosity of 400–600 mPa·s supports controlled dispensing and bonding through gaps up to 0.25 mm.
  • Fast fixture performance: Typical handling strength is achieved in approximately 10 seconds on steel, Buna N rubber, and phenolic.
  • Automated dispensing suitability: The one-part formulation is designed for accurate dosing in high-speed production processes.

Applications / Suitable for

  • Medical-device component assembly, subject to application-specific validation
  • Automated adhesive dispensing
  • Bonding components with small to intermediate gaps
  • High-speed industrial assembly
  • Bonding plastics, rubber, and metals
Product Family

PERMABOND 4C20

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TDS, SDS & Technical Documents

Technical Specifications

General Properties
Appearance
Appearance at room temperature.
Liquid
Chemistry Type
Ethyl cyanoacrylate
Color
The color
Colourless
Specific Gravity
Specific gravity (SG) is the ratio of the density of a substance to the density of a reference substance; equivalently, it is the ratio of the mass of a substance to the mass of a reference substance for the same given volume. For liquids, the reference substance is almost always water (1), while for gases, it is air (1.18) at room temperature. Specific gravity is unitless.
1.1
Physical Properties
Viscosity
Viscosity is a measurement of a fluid’s resistance to flow. Viscosity is commonly measured in centiPoise (cP). One cP is defined as the viscosity of water and all other viscosities are derived from this base. MPa is another common unit with a 1:1 conversion to cP. A product like honey would have a much higher viscosity -around 10,000 cPs- compared to water. As a result, honey would flow much slower out of a tipped glass than water would. The viscosity of a material can be decreased with an increase in temperature in order to better suit an application
400-600 mPa.s mPa.s
Mechanical Properties
Impact Strength
3-5 kJ/m² mm
Thermal Properties
Thermal Conductivity
Thermal conductivity describes the ability of a material to conduct heat. It is required by power packages in order to dissipate heat and maintain stable electrical performance. Thermal conductivity units are [W/(m K)] in the SI system and [Btu/(hr ft °F)] in the Imperial system.
0.1 W/m.K
Electrical Properties
Dielectric Strength
Dielectric strength is measured in kV per mm and is calculated by the Breakdown voltage divided by the thickness of the tested material. Those two properties go hand in hand and while Breakdown voltage is always thickness dependent, dielectric strength is a general material property. As an example, the dielectric strength of Polyimide is 236 kV/mm. If we place 1mm of Polyimide between two electrodes, it will act as an insulator until the voltage between the electrodes reaches 236 kV. At this point it will start acting as a good conductor, causing sparks, potential punctures and current flow.
25 kV/mm
Maximum gap fill
0.25 mm

Additional Information

Technical properties

As-supplied / before-processing properties

Typical uncured and curing properties. Values are guideline information and do not constitute product specifications.

Property Value Unit Method / condition
Chemical composition Ethyl cyanoacrylate — Single-component adhesive
Appearance Colorless liquid — As supplied
Viscosity 400–600 mPa·s At 25 °C; equivalent to cP
Specific gravity 1.1 — Typical uncured value
Maximum gap fill 0.25 mm Equivalent source value 0.008 in
Fixture time — steel 10 s Time to 0.3 N/mm² shear strength
Fixture time — Buna N rubber 10 s Time to 0.3 N/mm² shear strength
Fixture time — phenolic 10 s Time to 0.3 N/mm² shear strength
Full strength 24 h Typical full-strength development
Technical properties

After-processing / final-state properties

Typical cured performance values. Bond strength varies with substrate, surface preparation, joint gap, and curing conditions.

Property Value Unit Method / condition
Shear strength — steel 20–22 N/mm² ISO 4587; equivalent source range 2,900–3,200 psi
Impact strength 3–5 kJ/m² ASTM D950
Hardness 85 Shore D ISO 868
Dielectric strength 25 kV/mm Typical cured electrical property
Dielectric constant 2.5 — At 10 kHz
Thermal expansion coefficient 90 × 10-6 mm/mm/°C Typical cured thermal property
Thermal conductivity 0.1 W/(m·K) Typical cured thermal property
Minimum exposure temperature -55 °C Depends on the bonded materials; equivalent source value -65 °F

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