LOCTITE 662

Harmonization Code : 3824.99.92.97 | Prepared binders for foundry molds or cores; chemical products and preparations of the chemical or allied industries (including those consisting of mixtures of natural products), not elsewhere specified or included: other : other : other

LOCTITE 662 LOCTITE 662 LOCTITE 662 LOCTITE 662

Main features

  • Anaerobic-and-UV Dual Cure
  • Fast Exposed-Bead Fixturing
  • High-Strength Cylindrical Retention

Product Description

LOCTITE 662 is a yellow, medium-viscosity one-component retaining compound with anaerobic cure inside cylindrical metal fits and UV cure for exposed material outside the bondline. This dual mechanism allows the retained joint and visible overflow bead to be cured within one process. A 1,750 to 3,250 mPa s viscosity supports controlled application before assembly. UV exposure at the specified intensity can fixture glass assemblies in 10 seconds or less, while steel pin-and-collar shear strength develops through the specified ambient cure periods. The product is intended for high-strength retaining applications where exposed material also requires cure.

Key features

  • Anaerobic-and-UV dual cure: Confined material cures anaerobically while exposed beads can be cured with UV light.
  • Fast exposed-material fixture: The listed UV exposure fixtures glass in 10 seconds or less.
  • High-strength cylindrical retention: Steel pin-and-collar shear strength reaches 30 N/mm^2 after 24 hours at 22 deg C.

Applications / Suitable for

  • High-strength cylindrical retaining
  • Cylindrical fits with exposed adhesive beads
  • Assemblies requiring UV cure outside the bondline
Product Family

LOCTITE 662

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TDS, SDS & Technical Documents

Technical Specifications

General Properties
Chemistry Type
Urethane methacrylate
Color
The color
Yellow liquid
Component System
Describes the number of components that must be supplied, mixed, or activated before application or cure.
One component
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.
1.07
Thermal Properties
Linear thermal expansion
100×10^-6 K -1
Specific Heat Capacity
Specific heat capacity is the amount of heat energy required to raise the temperature of a substance per unit of mass. The specific heat capacity of a material is a physical property. It is also an example of an extensive property since its value is proportional to the size of the system being examined.
0.3 J/(g⋅°C)
Thermal Conductivity
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.
0.1 W/m.K
Physical Properties
Tack-Free Time
45 minutes
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
1,750 to 3,250 mPa.s
Curing Conditions
Fixture Time
≤10 seconds

Additional Information

Technical properties

As-supplied / before-processing properties

Typical values and characteristics for the product before cure, application, or assembly.

PropertyValueUnitMethod / condition
AppearanceYellow liquid-As supplied
Chemical typeUrethane methacrylate-One-component material
Specific gravity1.07-25 deg C
Viscosity1,750 to 3,250mPa sBrookfield RVT, spindle 3, 20 rpm, 25 deg C
Bondline cure mechanismAnaerobic-Confined between close-fitting metal surfaces
Exposed-material cure mechanismUV light-Visible overflow beads and fillets
Secondary cure supportActivator-When specified for the application
Technical properties

After-processing / final-state properties

Typical values for the cured, bonded, treated, or in-service product under the listed conditions.

PropertyValueUnitMethod / condition
UV fixture time on glass<=10s6 mW/cm^2 UV exposure
Tack-free time45s60 mW/cm^2 at 260 nm or 100 mW/cm^2 at 365 nm
Compressive shear strength>=10N/mm^2Steel pins and collars, cured 15 min at 22 deg C
Compressive shear strength30N/mm^2Steel pins and collars, cured 24 h at 22 deg C
Compressive shear strength>=25N/mm^2Steel pins and collars, cured 72 h at 22 deg C
Coefficient of thermal expansion100 x 10^-6K^-1Cured material
Thermal conductivity0.1W/(m K)Cured material
Specific heat0.3kJ/(kg K)Cured material

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