LOCTITE 635

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 635 LOCTITE 635 LOCTITE 635 LOCTITE 635

Main features

  • High-Strength Cylindrical Retention
  • Medium-Viscosity Application Control
  • Anaerobic One-Part Metal Cure

Product Description

LOCTITE 635 is a green, medium-viscosity one-component anaerobic retaining compound for high-strength bonding of cylindrical metal parts. It fills the clearance between close-fitting components and cures after air is excluded, locking rotors on shafts, bushings and sleeves, and press-fit assemblies. A 1,500 to 2,500 mPa s viscosity supports controlled application before assembly. The cured material develops measured compressive-shear strength on steel pins and collars, with strength increasing under the specified heat-cure schedules. This high-strength grade is intended for joints where permanent retention is preferred over routine disassembly.

Key features

  • High-strength cylindrical retention: Measured steel pin-and-collar shear values support permanent retaining applications.
  • Medium-viscosity placement control: A 1,500 to 2,500 mPa s viscosity supports controlled coverage of cylindrical fits.
  • Anaerobic one-part cure: The compound cures in confined metal joints without mixing.

Applications / Suitable for

  • Retaining rotors on shafts
  • Locking bushings and sleeves
  • Augmenting press-fit cylindrical assemblies
Product Family

LOCTITE 635

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TDS, SDS & Technical Documents

Technical Specifications

General Properties
Chemistry Type
Dimethacrylate ester
Color
The color
Green opaque 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.
1.1
Thermal Properties
Linear thermal expansion
80×10^-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
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
1,500 to 2,500 mPa.s
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.
<2 %

Additional Information

Technical properties

As-supplied / before-processing properties

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

PropertyValueUnitMethod / condition
AppearanceGreen opaque liquid-As supplied
Chemical typeDimethacrylate ester-One-component material
Specific gravity1.1-25 deg C
Viscosity1,500 to 2,500mPa sBrookfield RVT, spindle 3, 20 rpm, 25 deg C
Cure mechanismAnaerobic-Confined between close-fitting metal surfaces
Strength classHigh strength-Retaining-compound positioning
Technical properties

After-processing / final-state properties

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

PropertyValueUnitMethod / condition
Elongation at break<2%Cured material
Compressive shear strength>=13.8N/mm^2Steel pins and collars; 30 min at 22 deg C with Activator 7471 on one side
Compressive shear strength>=20N/mm^2Steel pins and collars; cured 24 h at 22 deg C
Compressive shear strength>=31N/mm^2Steel pins and collars; cured 1 h at 93 deg C, tested at 22 deg C
Compressive shear strength>=9.6N/mm^2Steel pins and collars; 1 h at 93 deg C plus 1 h at 149 deg C, tested at 149 deg C

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