PERMABOND ET502
Harmonization Code : 3214.10.00 | Putty and other mastics | Resin cements, caulking compounds and other mastics
Main features
- Clear Two-Part Epoxy Bondline
- 5-10 Minute Handling Strength
- 4 mm Gap Filling
Product Description
Permabond ET502 is a colorless two-part epoxy adhesive for general-purpose bonding where a clear bondline and room-temperature cure are required. The 1:1 system has a mixed viscosity of 45,000-90,000 mPa s at 25 deg C, fills gaps up to 4 mm, and provides a 3-5 minute pot life at 23 deg C. Handling strength is reached in 5-10 minutes, with full cure after 24 hours at 23 deg C. Applications include wood, metals, ceramics, selected plastics, and composites.
Key features
- Clear Bondline: Colorless components cure to a clear epoxy bondline.
- Rapid Handling: Reaches handling strength in 5-10 minutes at 23 deg C.
- 4 mm Gap Fill: Fills bond gaps up to 4 mm with a 1:1 mix ratio.
Applications
Applications include general-purpose bonding of wood, metals, ceramics, selected plastics, and composites where a clear bondline is required.
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Appearance
Colorless
Appearance at room temperature.
Component System
Two (Epoxy Resin / Amine Hardener)
Describes the number of components that must be supplied, mixed, or activated before application or cure.
Mix Ratio
1:1 by volume
The amount of a constituent divided by the total amount of all other constituents in a mixture
Pot Life
3-5 minutes
Pot life is the amount of time it takes for the viscosity of a material to double (or quadruple for lower viscosity materials) in room temperature after a material is mixed.
It is closely related to work life but it is not application dependent, less precise and more of a general indication of how fast a system is going to cure.
Specific Gravity
1.2 / 1.1
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.
Other Properties
Maximum gap fill
4 mm
Mechanical Properties
Elongation
<5 %
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.
Peel Strength
5-20 N/25mm
Thermal Properties
Glass Transition Temperature (Tg)
40-50 °C
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.
Electrical Properties
Dielectric Strength
15-25 kV/mm
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.
Additional Information
Technical properties
As supplied / before processing
Part A and Part B values are shown separately; mixed values apply after the stated 1:1 ratio.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Appearance | Part A: colorless; Part B: colorless | As supplied | |
| Part A viscosity | 80,000-150,000 | mPa s | At 25 deg C |
| Part B viscosity | 10,000-25,000 | mPa s | At 25 deg C |
| Mixed viscosity | 45,000-90,000 | mPa s | At 25 deg C |
| Specific gravity | Part A: 1.2; Part B: 1.1 | As supplied | |
| Mix ratio | 1:1 | By volume | |
| Maximum gap fill | 4 | mm | Typical curing property |
| Usable / pot life | 3-5 | minutes | At 23 deg C |
Technical properties
After processing / final state
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Shear strength - mild steel | 8-12 | N/mm2 | ISO 4587 |
| Peel strength - aluminum | 5-20 | N/25 mm | ISO 4578 |
| Hardness | 70-80 | Shore D | ISO 868 |
| Elongation at break | <5 | % | ISO 37 |
| Glass transition temperature, Tg | 40-50 | deg C | Typical cured value |
| Dielectric strength | 15-25 | kV/mm | Typical cured value |
