Precote® 200 Under-Head Coating – Reliable Sealing Built into the Fastener
Precote® 200 is a hot-curing, elastic 1-component polyurethane under-head coating designed to create an immediate seal once the fastener is assembled. Applied directly to the fastener, it forms a captive sealing element that helps simplify assembly, reduce loose sealing components, and support consistent performance in production environments.
Why Choose Precote® 200?
Precote® 200 helps engineers and manufacturers seal under-head fastener interfaces without relying on separate O-rings or gasket components. The coating is dry, non-tacky, and ready for assembly, making it a practical choice for high-volume fastening applications where cleanliness, repeatability, and immediate sealing performance matter.
Key Benefits
- Seals immediately after assembly
- Creates a captive sealing element on the fastener
- Helps eliminate loose O-rings and gasket seals in suitable applications
- Provides consistent assembly behavior
- Forms a dry-to-the-touch coating for cleaner handling
- Offers good resistance in aqueous media
- Supports reusable performance depending on fastener and joint geometry
- Non-hazardous and assembler-friendly
Ideal Applications
Precote® 200 is designed for sealing the mating surfaces of flange screws, collar screws, plugs, and rivets. It is especially useful where the sealing function needs to be integrated directly onto the fastener before assembly.
Common application areas include automotive, e-mobility, electronics, electric motors, household appliances, office machines, computer industry components, and two-wheel vehicle applications.
Suitable Fastener Geometries
Best performance depends on the relationship between the tapped hole, flange, and screw head geometry. Suitable geometries may include grooved, stepped, concave, or countersunk support surfaces. The coating should not be mechanically overloaded during assembly, and application testing is recommended before series production.
Product Properties
- Technology: hot-curing elastic 1-component polyurethane
- Sealing function: immediate sealing after assembly
- Handling: dry-to-the-touch coating
- Seal format: captive under-head sealing element
- Media resistance: good resistance in aqueous media
- Typical use: under-head sealing for headed fasteners, plugs, and rivets
Technical Data
| Property | Precote® 200 Detail |
|---|---|
| Chemical type | Polyurethane |
| Color1 | Blue |
| Shore A Hardness | 50 – 65 |
| Maximum operation temperature in air | -40°C to +100°C / -40°F to +210°F |
1 This product information is also valid for special colors. The specified color is not a primary product feature. The color may vary slightly due to the manufacturing process and the formulation. This does not affect the quality of the product.
Chemical Resistance
Coated parts have a storage stability of up to 4 years when stored at a maximum of 30°C and 65% relative humidity. Packaging and handling instructions from omniTECHNIK should be followed to maintain product integrity.
Partner With Forest City Technologies
Forest City Technologies applies Precote® pre-applied chemistries to help manufacturers improve fastener performance, streamline assembly, and solve sealing challenges with engineered coating solutions. Contact Forest City Technologies to review your application requirements, fastener geometry, operating conditions, and production needs.
