PERMABOND ET-5428

Harmonization Code : 3214.10.00 | Putty and other mastics | Resin cements, caulking compounds and other mastics

PERMABOND ET-5428

Main features

  • 5 mm Composite Gap Filling
  • 30-45 Minute Handling Strength
  • High Shear and Peel Strength

Product Description

Permabond ET5428 is a two-part thixotropic epoxy adhesive formulated for tough, high-strength composite assembly bonding. Its controlled-flow consistency fills gaps up to 5 mm, while the 2:1 mix ratio and 10-20 minute pot life at 23 deg C support measured mixing or cartridge dispensing. Handling strength is reached in 30-45 minutes, and full cure develops in 24-48 hours at 23 deg C or 1 hour at 60 deg C. Typical cured performance includes 28-34 N/mm2 shear strength on mild steel and 150-250 N/25 mm peel strength on aluminum.

Key features

  • Composite Assembly Bonding: Formulated for tough, high-strength bonding of composite assemblies.
  • 5 mm Gap Fill: Controlled-flow thixotropy fills gaps up to 5 mm.
  • Rapid Handling: Reaches handling strength in 30-45 minutes at 23 deg C.

Applications

Applications include structural bonding of composite assemblies and gap-filling epoxy bonds that require controlled flow, high shear strength, and high peel strength.

Product Family

PERMABOND ET-5428

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TDS, SDS & Technical Documents

Technical Specifications

General Properties
Appearance
Appearance at room temperature.
White / Cream
Component System
Describes the number of components that must be supplied, mixed, or activated before application or cure.
Two (Epoxy Resin / Polyamine Hardener)
Mix Ratio
The amount of a constituent divided by the total amount of all other constituents in a mixture
2:1 by weight
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
Other Properties
Maximum gap fill
5 mm
Mechanical Properties
Elongation
Elongation is the process of lengthening something. It is a percentage that measures the initial, unstressed, length compared to the length of the material right before it breaks. It is commonly referred to as Ultimate Elongation or Tensile Elongation at break.
<5 %
Thermal Properties
Glass Transition Temperature (Tg)
The glass transition temperature for organic adhesives is a temperature region where the polymers change from glassy and brittle to soft and rubbery. Increasing the temperature further continues the softening process as the viscosity drops too. Temperatures between the glass transition temperature and below the decomposition point of the adhesive are the best region for bonding. The glass-transition temperature Tg of a material characterizes the range of temperatures over which this glass transition occurs.
50-60 °C
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.
15-25 kV/mm

Additional Information

Technical properties

As supplied / before processing

Part A and Part B values are shown separately; processing values apply after the stated 2:1 mix ratio.

Property Value Unit Method / condition
Part A viscosity115,000mPa s20 rpm at 25 deg C
Part B viscosity200,000mPa s20 rpm at 25 deg C
Specific gravityPart A: 1.1; Part B: 1.1As supplied
Mix ratio2:1By volume and by weight
Maximum gap fill5mmTypical curing property
Usable / pot life10-20minutes10 g mixed at 23 deg C
Handling time30-45minutesAt 23 deg C
Full cure24-48 hours; 1 hourAt 23 deg C; at 60 deg C
Technical properties

After processing / final state

Property Value Unit Method / condition
Shear strength - mild steel28-34N/mm2ISO 4587
Shear strength - aluminum22-28N/mm2ISO 4587
Shear strength - stainless steel29-35N/mm2ISO 4587
Peel strength - aluminum150-250N/25 mmISO 4578
Impact strength30-40kJ/m2ASTM D-950
Hardness65-75Shore DISO 868
Glass transition temperature, Tg50-60deg CTypical cured value

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