What is the Precote 80 Thread Locking and Sealing Coating?
Precote® 80 is a high-strength, solvent-free thread locking and sealing coating based on microencapsulated acrylates. Applied as a varnish-like, dry, tack-free film, the coating remains inactive until the threaded components are assembled. During installation, shear and pressure rupture the microcapsules, allowing the adhesive to activate and cure.
Designed for high-strength thread locking with a reliable sealing effect, Precote 80 maintains its locking performance even at elevated temperatures. It can be used on both external and internal threads and is well suited for a wide range of assembly procedures, particularly serial and high-volume production.
Key Benefits
- High-strength thread locking for demanding threaded assemblies
- Maintains locking performance at high temperatures
- Solvent-free, microencapsulated acrylate technology
- Dry, tack-free coating that is captive on the threaded component
- Consistent assembly properties
- Good chemical and temperature resistance
- Temperature resistance up to +170°C under DIN 267-27
- Temperature resistance up to +200°C under GMW 14657
- No post-curing after repeated temperature exposure
- Helps prevent corrosion in threaded connections
- Suitable for automated, serial, and high-volume assembly
- Multiple formulations available for different thread sizes and curing requirements
Where Is Precote 80 Used?
| Precote 80 Version | Recommended Application |
|---|---|
| Precote 80 | Threads larger than M6 with pitches greater than 1 mm |
| Precote 80-3 | Threads larger than M6 where accelerated curing is required |
| Precote 80-8 | Threads M6 and smaller or pitches of 1 mm and smaller, up to a maximum of M10 x 1 |
All versions of Precote 80 are high-strength thread locking coatings and can be used on internal and external threads. The 80-3 and 80-8 versions provide the same physical data and chemical resistance as standard Precote 80 after complete curing.
Industries & Markets
| Industry or Market | Typical Application |
|---|---|
| Automotive | High-strength threaded connections requiring reliable locking and resistance to demanding operating conditions |
| E-Mobility | Fastener assemblies used in electric mobility systems |
| Electronics | Internal and external threaded component assemblies |
| Two-Wheel Industry | Threaded connections requiring durable locking performance |
| Electric Motors | Fasteners used in motor and component assemblies |
| Household Appliances | High-volume threaded component assembly |
| Office Machines | Secure locking of threaded components |
| Computer Industry | Threaded assemblies used in equipment and component manufacturing |
Technical Highlights
| Property | Precote 80 Performance |
|---|---|
| Chemical Type | Acrylate |
| Coating Technology | Microencapsulated, solvent-free coating system |
| Strength Classification | High strength |
| Thread Friction | μThread > 0.25 |
| Final Strength at Room Temperature | Approximately 24 hours |
| DIN 267-27 Performance | Precote 80: 6 hours; Precote 80-8: 6 hours; Precote 80-3: 0.5 hours |
| Prevailing-In Torque (PIT) | < 3 Nm |
| Strength Without Preload (BAT) | > 20 Nm |
| Prevailing-Out Torque (POT) | < 55 Nm |
| Temperature Range – DIN 267-27 | -60°C to +170°C (-75°F to +340°F) |
| Temperature Range – GMW 14657 | -60°C to +200°C (-75°F to +390°F) |
| Shelf Life of Coated Parts | 4 years at max. 30°C and max. 65% relative humidity |
Technical values are based on the testing conditions identified in the product information and may vary depending on thread dimensions, materials, surface conditions, and component combinations.
Chemical Resistance
Precote 80 provides chemical resistance tested according to current automotive standards and DIN 267-27, with a storage time of 1,000 hours.
| Chemical | Test Temperature |
|---|---|
| Engine Oil | 150°C |
| Super-Grade Gasoline | 23°C |
| DOT 4 Brake Fluid | 90°C |
| Anti-Freeze, 100% | 120°C |
| Anti-Freeze/Water, 50:50 | 120°C |
| Automatic Transmission Oil | 150°C |
| Transmission Oil | 120°C |
| Polyurea AdBlue® | 23°C |
Need a High-Strength Thread Locking Solution?
Precote 80 provides a pre-applied solution for threaded assemblies that require high locking strength, dependable sealing performance, and resistance to elevated temperatures. With formulations available for different thread sizes and curing requirements, Precote 80 can support demanding automotive, electrical, e-mobility, and high-volume manufacturing applications.
