Grounding "Undercoating"
The HP-UC primer system improves the adhesion of 2K PU paints and clear coats on GFRP, CFRP, metals, and paintable plastics. This solvent-based 1K primer is applied directly before coating and ensures a permanent bond, uniform paint application, and long-term durability – even under thermal and mechanical stress.
Primer & adhesion promoter for composites and plastics
What is the HP-UC primer system and how does it work?
The HP-UC primer system is a solvent-based 1K specialty primer that acts as an adhesion promoter between the substrate and subsequent 2K PU topcoats or clear coats. It is specifically designed for fiber-reinforced composites such as GFRP and CFRP, as well as for metals, thermoplastics, and plastics. The primer forms an intermediate layer that ensures a bond between part and coating. This is crucial on surfaces requiring chemical resistance and mechanical durability. The system is fast-drying and easy to apply by brush, roller, or spray.
What are the typical applications for HP-UC undercoating?
HP-UC undercoating is ideal for projects requiring durable paint adhesion on technical plastics, GFRP parts, or carbon components. Typical uses include boat building, automotive construction, model making, and the coating of technical housings, sports equipment, or design components subject to high mechanical and thermal loads. Used in combination with 2K PUR topcoats such as HP-PP or HP-PUR, the primer ensures that the coating system remains stable. With its ease of application and short flash-off time HP-UC is a reliable solution for workshops, industrial applications, and professional users.