What Is the LOCTITE® DRI 2250-W™ Coating for Threaded Fasteners?
LOCTITE® DRI 2250-W™ is a medium- to high-strength, pre-applied threadlocking coating designed to help prevent threaded fasteners from loosening while also providing thread sealing after curing. The two-component acrylic coating is based on methacrylate ester technology and is designed to adhere to a variety of fastener finishes.
The dry-to-the-touch coating remains inert until assembly. During installation, microcapsules within the coating are crushed, releasing an active ingredient that initiates the anaerobic curing process. This creates a reliable locking and sealing solution for threaded assemblies.
LOCTITE® DRI 2250-W™ is particularly well suited for automotive and high-volume manufacturing applications where threaded components need to arrive ready for immediate assembly and applying a liquid threadlocker during production may not be practical.
Key Benefits
- Medium- to high-strength threadlocking to help prevent fastener loosening
- Pre-applied, dry-to-the-touch coating for ready-to-use threaded components
- Acts as a thread sealant after curing
- Good adhesion to a variety of fastener finishes
- Suitable for plain and passivated metal surfaces
- Good hot-strength and heat-aging performance
- Heat-aging capabilities up to 220°C
- Good chemical and solvent resistance
- Designed to meet automotive specification requirements
- Flow-coatable formulation for efficient application
- Can be diluted with DI/RO water to adjust viscosity for processing
- Suitable for high-volume manufacturing environments
- On-part life of 1 to 4 years, depending on storage conditions
Where Is LOCTITE® DRI 2250-W™ Used?
| Application | How LOCTITE DRI 2250-W Supports the Assembly |
|---|---|
| Threaded Fasteners | Provides medium- to high-strength locking to help prevent loosening |
| Automotive Assemblies | Designed to meet demanding automotive specification requirements |
| High-Volume Manufacturing | Allows threaded components to arrive pre-applied and ready for assembly |
| Plain Metal Surfaces | Suitable for threaded connections using plain metal substrates |
| Passivated Metal Surfaces | Provides good adhesion and compatibility with passivated metal surfaces |
| Heat-Exposed Assemblies | Offers hot-strength and heat-aging capabilities up to 220°C |
| Applications Requiring Thread Sealing | Functions as a thread sealant after curing |
| Automated Coating Operations | Flow-coatable formulation can be adjusted with DI/RO water for easier processing |
The product is applied to threaded parts by authorized process centers equipped for fastener cleaning, feeding, coating, rust proofing, and drying. Sample testing is recommended to confirm performance on specific parts and applications.
Industries & Markets
| Industry or Market | Typical Application |
|---|---|
| Automotive | Threaded fasteners designed to meet demanding automotive specifications |
| Automotive Components | Fasteners exposed to heat, chemicals, and demanding operating conditions |
| High-Volume Manufacturing | Pre-applied threaded components ready for efficient assembly |
| Industrial Manufacturing | Threaded assemblies requiring dependable locking and sealing |
| Metal Component Manufacturing | Plain and passivated metal fasteners and threaded parts |
| Automated Fastener Processing | Components requiring a flow-coatable pre-applied threadlocking solution |
Technical Highlights
| Property | LOCTITE DRI 2250-W Performance |
|---|---|
| Technology | Acrylic |
| Chemical Type | Methacrylate ester |
| Components | Two-component system |
| Cure Type | Anaerobic |
| Application | Threadlocking |
| Strength Classification | Medium to high strength |
| Application Advantage | Flow-coatable and viscosity adjustable with DI/RO water |
| Compatible Substrates | Plain and passivated metal surfaces |
| Cured Thermal Stability | ≤200°C |
| Heat-Aging Capability | Up to 220°C |
| Breakaway Torque After 24 Hours at 22°C | ≥50 Nm on tested M10 × 1.5 steel bolts |
| Breakaway Torque After 72 Hours at 22°C | ≥50 Nm on tested M10 × 1.5 steel bolts with zinc-plated nuts |
| Breakloose Torque – Zinc Phosphate | ≥40 Nm |
| Breakloose Torque – Zinc Flake | ≥35 Nm |
| Breakloose Torque – Stainless Steel | ≥45 Nm |
| Coefficient of Friction | 0.11–0.15 on specified tested fastener combinations |
| On-Part Life | 1 to 4 years, depending on coated fastener storage conditions |
Performance values are based on the specific test methods and fastener combinations identified in the technical data sheet. Actual performance can vary depending on surface finish, surface roughness, lubrication, assembly conditions, and thread geometry.
Chemical Resistance
LOCTITE DRI 2250-W was tested for chemical and solvent resistance under the conditions shown below. Results represent the percentage of initial breakaway strength retained after exposure.
| Chemical or Environment | Test Temperature | 168 hours | 500 hours | 1,000 hours |
|---|---|---|---|---|
| Motor Oil | 120°C | 37% | 33% | 32% |
| Motor Oil | 150°C | 18% | 19% | 19% |
| Unleaded Gasoline | 22°C | 82% | 78% | 77% |
| Brake fluid | 90°C | 85% | 82% | 62% |
| Water/Glycol 50/50 | 120°C | 32% | 30% | 27% |
| Transmission Fluid | 120°C | 34% | 37% | 36% |
| Transmission Fluid | 150°C | 18% | 17% | 19% |
| Gear Oil | 120°C | 40% | 34% | 39% |
| DEF (AdBlue®) | 22°C | 85% | 94% | 104% |
Need a High-Performance Pre-Applied Threadlocking Solution?
LOCTITE® DRI 2250-W™ provides a ready-to-use threadlocking solution for threaded assemblies that require strong resistance to loosening, reliable adhesion across a variety of fastener finishes, and dependable performance in demanding manufacturing environments. Its flow-coatable, pre-applied formulation supports efficient processing while providing threadlocking and sealing performance after assembly.
