PERMABOND HM-129
Harmonization Code : 3910.00.00.90 | Silicones in Primary Forms; Others
Main features
- High-Strength Permanent Thread Locking and Sealing
- Oil-Tolerant Threadlocking with Normal Surface Prep
- High Prevailing Torque for Fastener Retention
Product Description
Permabond HM129 is a high-strength, medium-viscosity anaerobic threadlocker and sealant for permanent threaded metal fastener assemblies. It locks and seals bolts, nuts and screws and is also used on larger threaded assemblies. The 500 cP material reaches typical handling strength on M10 steel in 10 minutes at 23 deg C, working strength in 1-3 hours, and full strength in 24 hours. Its cured M10 torque is typically 33 N m break and 58 N m prevailing to ISO 10964. HM129 is also described as oil tolerant, while normal surface preparation remains recommended for consistent results.
Key features
- High-strength permanent locking and sealing: Locks and seals bolts, nuts and screws that require permanent assembly.
- Oil-tolerant application: Can tolerate some oil on surfaces, while normal surface preparation remains recommended for consistent results.
- High prevailing torque: Typical prevailing torque is 58 N m on M10 steel to ISO 10964.
Applications
Permanent locking and sealing of threaded metal fasteners and larger threaded assemblies.
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Appearance
Red
Appearance at room temperature.
Chemistry Type
Acrylic
Specific Gravity
1.1
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.
Physical Properties
Viscosity
500 mPa.s
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
Electrical Properties
Dielectric Strength
11 kV/mm
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.
Thermal Properties
Thermal Conductivity
0.19 W/m.K
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.
Additional Information
Technical properties
As-supplied / before-processing properties
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Chemical composition | Acrylic | - | Uncured material |
| Viscosity | 500 | cP | Uncured material; 25 deg C |
| Specific gravity | 1.1 | - | Uncured material |
| Storage temperature | 5 to 25 | deg C | Manufacturer storage guidance |
Technical properties
After-processing / final-state properties
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Break torque | 33 | N m | Typical cured material; M10 steel; ISO 10964 |
| Prevailing torque | 58 | N m | Typical cured material; M10 steel; ISO 10964 |
| Shear strength | 17 | MPa | Typical cured material; steel collar and pin; ISO 10123 |
