What Is the LOCTITE® DRI 204™ Coating for Threaded Fasteners?
LOCTITE® DRI 204™ is a high-strength, dry-to-the-touch pre-applied threadlocking and sealing film for threaded fasteners. The acrylic, methacrylate ester coating remains inert until assembly releases the quick-curing resin.
The resin fills thread voids and cures to securely lock and seal the assembly, helping prevent loosening caused by vibration. DRI 204 is designed for applications operating from -54°C to +150°C and is identified as a low-toxicity product.
Key Benefits
- High-strength threadlocking
- Locks and seals threaded assemblies
- Helps prevent vibration-related loosening
- Dry-to-the-touch, pre-applied film
- 10-minute fixture time
- Four-year on-part life
- Operating range of -54°C to +150°C
- Strong breakaway and breakloose torque performance
- Performs on several steel fastener finishes
- Good resistance to common automotive and industrial fluids
- Low toxicity
Where Is LOCTITE® DRI 204™ Used?
| Application | How DRI 204 Supports the Assembly |
|---|---|
| Carburetor Screws | Provides high-strength locking |
| Transmission Nuts | Helps resist vibration and loosening |
| Head Bolts | Provides strong locking and sealing |
| Truck Axle Bolts | Helps secure demanding threaded connections |
| Tower Bolts | Provides high-strength locking |
| Transmission Bolts | Locks and seals threaded connections |
| Pipe Plugs & Fittings | Seals thread voids after curing |
| High-Strength Fastener Assemblies | Provides pre-applied locking performance prior to installation |
Industries & Markets
| Industry or Market | Typical Application |
|---|---|
| Automotive | High-strength threaded fastener applications |
| Heavy-Duty Vehicles | Truck axle and vibration-exposed components |
| Powertrain & Transmission | Transmission nuts and bolts |
| Industrial Manufacturing | High-strength locking and sealing |
| Fluid Handling | Pipe plugs and fittings |
| Fastener Manufacturing | Pre-applied locking and sealing treatments |
Technical Highlights
| Property | LOCTITE DRI 204 Performance |
|---|---|
| Technology | Acrylic |
| Chemical Type | Methacrylate ester |
| Cure | Anaerobic |
| Application | Threadlocking, sealing |
| Strength | High |
| Toxicity | Low |
| Operating Range | -54°C to +150°C |
| On-Part Life | 4 years |
| Cure Time | 72 hours |
| Fixture Time | 10 minutes |
| Breakaway Torque After Heat Exposure | ≥26 N·m |
| Breakloose Torque – Anti-Rust Steel | 49 N·m |
| Breakloose Torque – Zinc-Plated Steel | 53 N·m |
| Breakloose Torque – Magni 554 | 53 N·m |
| Coefficient of Friction | 0.15–0.20 depending on tested combination |
Chemical Resistance
| Environment | Temperature | 100 hours | 500 hours | 1,000 hours |
|---|---|---|---|---|
| Motor Oil | 125°C | 117% | 96% | 86% |
| Motor Oil | 87°C | 125% | 112% | 105% |
| ATF | 125°C | 100% | 100% | 100% |
| Unleaded Gasoline | 22°C | 102% | 113% | 119% |
| Brake fluid | 22°C | 101% | 105% | 114% |
| Ethanol | 22°C | 102% | 112% | 112% |
| 1, 1, 1 Trichloroethane | 22°C | 104% | 116% | 112% |
| Water/Glycol 50/50 | 87°C | 119% | 112% | 108% |
Need High-Strength Locking Before Your Fasteners Reach the Line?
LOCTITE DRI 204 provides high-strength threadlocking and sealing in a dry-to-the-touch coating designed to help threaded connections resist vibration and loosening.
