LOCTITE EA 608
Harmonization Code : 3919.10.80 | Other self-adhesive plastic rolls not exceeding 20 cm wide.
Main features
- Clear Fast-Setting Structural Epoxy
- 1:1 Weight/Volume Mixing
- Metal and Plastic Bonding
Product Description
LOCTITE® EA 608 is a clear, two-part, fast-setting epoxy adhesive for structural bonding applications where optical clarity or a short processing time is important. The adhesive mixes at a 1:1 ratio by weight or volume and develops a clear to light-amber appearance after mixing. It has a typical pot life of 5 minutes at 77°F for a 20-gram mixed quantity and reaches handling strength in approximately 10–15 minutes at 77°F, depending on the bond configuration. LOCTITE® EA 608 bonds a variety of metals and plastics and can be fully cured at room temperature or with an accelerated heat cure.
Key features
- Clear structural bonding: The mixed adhesive cures clear to light amber for assemblies where bondline appearance or optical clarity is important.
- Fast handling strength: Develops handling strength in approximately 10–15 minutes at 77°F, depending on the bond configuration.
- Simple 1:1 mixing: Parts A and B are combined at a 1:1 ratio by both weight and volume for cartridge or bulk application.
Applications / Suitable for
- Structural bonding
- Bonding metals
- Bonding plastics
- Assemblies requiring a clear adhesive bondline
Technical Specifications
General Properties
Color
Milky white / amber / clear or light amber
The color
Mix Ratio
1:1
The amount of a constituent divided by the total amount of all other constituents in a mixture
Pot Life
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
1.16
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.
Physical Properties
Viscosity (Part B)
20000–40000 mPa.s
Thermal Properties
Thermal Conductivity
0.2 W/m.K
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.
Electrical Properties
Dielectric Strength
47 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 properties
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Mix ratio | 1:1 | — | Part A:Part B, by weight or volume |
| Pot life | 5 | min | Typical; mixed adhesive, 20-gram quantity at 77°F |
| Color | Milky white / amber / clear to light amber | — | Part A / Part B / mixed adhesive |
| Viscosity | 200,000–450,000 | cP | Typical; Part A, ASTM D2393 |
| Viscosity | 20,000–40,000 | cP | Typical; Part B |
| Specific gravity | 1.17 / 1.15 / 1.16 | — | Typical; Part A / Part B / mixed adhesive |
After-processing / final-state properties
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Coefficient of thermal expansion | 86 × 10−6 | in/in/°C | Typical; ASTM D696 |
| Thermal conductivity | 5.0 × 10−4 | cal·cm/(cm²·s·°C) | Typical cured-material value |
| Hardness | 80 | Shore D | Typical cured-material value |
| Dielectric strength | 1,200 | V/mil | Typical; ASTM D149 |
| Dielectric constant | 3.78 | — | Typical; 1 kHz, method shown in source as MIL 1-16923 |
| Dissipation factor | 2.1 × 10−4 | — | Typical; ASTM D150 at 1 kHz |
| Shear strength | 2,000 | psi | Typical; ASTM D1002, etched aluminum, cured 24 hours at 77°F and tested at 77°F |
| Shear strength | 3,000 | psi | Typical; ASTM D1002, etched aluminum, cured 2 hours at 140°F and tested at 77°F |
