ABLESTIK 342-3.5

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

ABLESTIK 342-3.5

Main features

  • Two-Part Ambient-Cure Processing
  • 5,000 mPa s Application Viscosity
  • 29.0 N/mm^2 Aluminum Lap Shear

Product Description

LOCTITE® ABLESTIK 342-3.5 is a two-component amber epoxy adhesive for general assembly applications. It can cure at room temperature or with heat and is documented for bonding semi-porous materials such as ferrites where a physical bond is required. The adhesive provides a typical viscosity of 5,000 mPa·s at 25°C and an eight-hour work life at 25°C. Guideline cure options include 48 hours at 25°C, 4 hours at 75°C, 2 hours at 95°C, or 1 hour at 120°C. Typical cured properties include Shore D hardness of 86, a glass-transition temperature of 71°C, and aluminum-to-aluminum lap shear strength of 29.0 N/mm² at 25°C.

Key features

  • Room-temperature or heat cure: Guideline cure schedules range from 48 hours at 25°C to 1 hour at 120°C.
  • Extended working time: Typical work life is eight hours at 25°C, based on a 25% increase in viscosity.
  • High bonded-joint strength: Typical aluminum-to-aluminum lap shear strength is 29.0 N/mm² at 25°C.

Applications / Suitable for

  • General assembly bonding
  • Bonding semi-porous materials such as ferrites where a physical bond is required
  • Aluminum-to-aluminum bonding under the documented test condition
Product Family

ABLESTIK 342-3.5

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TDS, SDS & Technical Documents

Technical Specifications

General Properties
Appearance
Appearance at room temperature.
Amber
Chemistry Type
Epoxy
Work life @25°C
Work life is the amount of time we have to work with a material until it is no longer able to be easily worked and applied on a substrate. It is based on the change in viscosity and it can rely on the application requirements.
8 hours
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.
71 °C
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
5000 mPa.s

Additional Information

Technical properties

As-supplied / before-processing properties

Typical physical, handling, storage, and guideline cure information before final processing.

Property Value Unit Method / condition
Technology Epoxy — Two-component adhesive
Appearance Amber liquid / paste — TDS appearance and SDS physical-state description
Viscosity 5,000 mPa·s (cP) Brookfield CP51, 5 rpm at 25°C
Density / relative density 1.2 — SDS physical-property value
VOC content 2 g/L SDS value
Work life 8 hours At 25°C; endpoint is a 25% increase in viscosity
Shelf life — kits 365 days At 25°C, from date of manufacture
Shelf life — premixed frozen syringes 365 days At -40°C, from date of manufacture
Recommended cure schedule 48 hours At 25°C; guideline recommendation
Alternative cure schedules 4 hours, 2 hours, or 1 hour — 4 hours at 75°C, 2 hours at 95°C, or 1 hour at 120°C; guideline recommendations
Technical properties

After-processing / final-state properties

Typical physical, thermal, and bonded-joint properties of the cured adhesive. Values are reference data and are not product specifications.

Property Value Unit Method / condition
Hardness 86 Shore D Cure condition and test method not stated
Glass-transition temperature 71 °C Method and cure condition not stated
Coefficient of thermal expansion — below Tg 35 ppm/°C TMA; cure condition not stated
Coefficient of thermal expansion — above Tg 180 ppm/°C TMA; cure condition not stated
Lap shear strength — aluminum to aluminum 29.0 (4,200) N/mm² (psi) Tested at 25°C; surface preparation, bondline, cure condition, and test method not stated

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