ABLESTIK G757HF-D

Harmonization Code : 38159000 | Unspecified reaction initiators, accelerators, and catalytic preparations

ABLESTIK G757HF-D

Main features

  • Automotive Headlamp Lens Bonding
  • Thixotropic Sag-Resistant Placement
  • Flexible -40 to 150 deg C Operation

Product Description

LOCTITE ABLESTIK G757HF-D is a one-part, gray, thixotropic epoxy adhesive for bonding automotive headlamp lenses to reflectors. The heat-cure material is supported on glass, steel, copper, aluminum, and fiber-reinforced plastic. Its 400 mil sag-resistance value and thixotropic behavior keep the applied adhesive in place during assembly. Recommended cure options are 45 minutes at 140 deg C, 20 minutes at 160 deg C, or 10 minutes at 180 deg C. The cured adhesive remains flexible across its stated -40 to 140 deg C operating range and has a typical aluminum-to-aluminum lap shear strength of 10 N/mm^2 at 25 deg C.

Key features

  • Headlamp lens-to-reflector bonding: The one-part adhesive is specifically intended for automotive headlamp lens and reflector assembly.
  • Flexible temperature performance: The cured adhesive remains flexible across the stated -40 to 140 deg C operating range.


Applications

Applications include bonding automotive headlamp lenses to reflectors using supported glass, metal, and fiber-reinforced plastic surfaces.

Product Family

ABLESTIK G757HF-D

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Technical Specifications

General Properties
Appearance
Appearance at room temperature.
Gray
Density (g)
1.15 g/cm3
Pot Life
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.
1 months
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.
130.2 °C
Operating Temperature
-40 to +140 °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
275,000 mPa.s
Electrical Properties
Surface Resistivity
1.1×10¹⁸ Ohms/sq
Volume Resistivity
Volume resistivity, also called volume resistance, bulk resistance or bulk resistivity is a thickness dependent measurement of the resistivity of a material perpendicular to the plane of the surface.
1.2×10¹⁸ Ohms⋅cm

Additional Information

Technical properties

As-supplied / before-processing properties

Technical values are typical; cure schedules are guideline recommendations.

Property Value Unit Method / condition
Appearance Gray   As supplied
Density 1.15 g/cm^3 Typical
Sag resistance 1.8 mm 25 deg C
Press flow 100 seconds Typical
Storage life 6 months 0 deg C
Cure schedule 45 at 140; 20 at 160; 10 at 180 minutes at deg C Guideline heat-cure options
Technical properties

After-processing / final-state properties

Final-state values are typical for cured LOCTITE ABLESTIK G 757 under the stated test conditions.

Property Value Unit Method / condition
Operating temperature -40 to 140 deg C Product operating range
Shore D hardness 42   25 deg C
Shore A hardness 85   120 deg C
Tensile peel strength 1.75 N/mm^2 Aluminum-to-aluminum; 25 deg C
Tensile lap shear strength 10 N/mm^2 Aluminum-to-aluminum; 25 deg C

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