LOCTITE EA E-120HP

Harmonization Code : 3506.91.90.99 | 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 ; Adhesives based on polymers of headings 3901 to 3913 or on rubber; Other ; Other

LOCTITE EA E-120HP

Main features

  • 120-Minute Working Life
  • Peel, Impact, Thermal-Shock, and Chemical Resistance
  • Aerospace and Industrial Bonding

Product Description

LOCTITE® EA E-120HP is a two-component, high-viscosity epoxy adhesive with an extended working life and room-temperature cure. The resin and polyamide hardener mix at a 2:1 ratio by volume to form a tough, amber-beige bondline with resistance to peel, impact, thermal shock, solvents, and chemicals. The adhesive bonds dissimilar materials, including aluminum, steel, other metals, plastics, and ceramics. Its combination of a 120-minute working life and durable cured properties supports aerospace nose-cone bonding and low-stress general industrial assemblies requiring high peel and impact strength.

Key features

  • Extended working life: The mixed adhesive has a typical working life of 120 minutes for applications requiring additional assembly time.
  • Tough cured bondline: The room-temperature-curing epoxy is formulated for resistance to peel, impact, and thermal shock.
  • Broad substrate bonding: Suitable for bonding aluminum, steel, other metals, plastics, and ceramics.

Applications / Suitable for

  • Aerospace nose-cone bonding
  • Low-stress general industrial assemblies requiring high peel and impact strength
  • Bonding dissimilar metals, plastics, and ceramics
Product Family

LOCTITE EA E-120HP

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TDS, SDS & Technical Documents

Technical Specifications

General Properties
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
Tack-Free Time
140 minutes
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.
90 °C
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.
10 %
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

Additional Information

Technical properties

As-supplied / before-processing properties

Typical properties of the separate components and mixed adhesive.

Property Value Unit Method / condition
Appearance Resin: off-white to beige liquid; hardener: amber liquid; mixture: amber-beige — Visual
Mix ratio, resin:hardener 2:1 By volume Two-component system
Mix ratio, resin:hardener 100:46 By weight Two-component system
Resin viscosity 41,000–61,000 mPa·s (cP) Brookfield RVT, 25 °C, spindle 7, 50 rpm
Hardener viscosity 2,000–4,000 mPa·s (cP) Brookfield RVT, 25 °C, spindle 5, 50 rpm
Specific gravity Resin: 1.1; hardener: 1.0; mixed: 1.1 — At 25 °C
Working life 120 min Mixed adhesive
Tack-free time 140 min Mixed adhesive; low humidity

After-processing / final-state properties

Typical physical, electrical, and adhesive properties after the specified cure conditions.

Property Value Unit Method / condition
Glass transition temperature 90 °C ASTM E1640; cured 7 days at 22 °C
Shore hardness 76–90 Durometer D ISO 868; cured 16–18 h at 22 °C followed by 2 h at 65 °C
Elongation 10 % ISO 527-2; cured 7 days at 22 °C
Tensile strength 41 N/mm² ISO 527-3; cured 7 days at 22 °C
Dielectric breakdown strength 25 kV/mm IEC 60243-1; cured 7 days at 22 °C
Lap shear strength, aluminum ≥13.7 N/mm² Acid-etched aluminum; cured 2 h at 65 °C
Lap shear strength, steel 30 N/mm² Grit-blasted steel; cured 12 h at 65 °C
Lap shear strength, aluminum 33 N/mm² Acid-etched and abraded aluminum; 0.1–0.2 mm gap; cured 12 h at 65 °C

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