Hempel’s Underwater Primer is a fast-drying, high-performance coating designed for use below the waterline. Formulated with aluminium flakes, this primer provides exceptional adhesion and corrosion resistance on a variety of substrates, including GRP, wood, and steel. It functions as an effective tie coat over epoxy primers or as a sealer for existing antifouling layers.
This primer ensures robust protection against moisture ingress, with a smooth finish that promotes optimal application of antifouling paints. Its advanced formulation is suitable for keels and other high-stress areas, offering long-lasting durability in harsh marine environments.
- Exceptional adhesion to GRP, wood, and steel.
- Fast-drying with aluminium flakes for added durability.
- Can be used as a sealer for existing antifouling.
- Ideal as a tie coat over epoxy primers.
- Smooth finish for easy antifouling application.
Technical Specifications
- Volume: 2.5L
- Colour: Aluminium grey (shade 19000)
- Dry Film Thickness: 50 microns
- Theoretical Coverage: 7.8 m²/L
- Application Methods: Roller, brush, or spray (thinning: max 5%)
- Drying Time: Touch dry in 3 hours at 20°C (6 hours at 10°C)
- Overcoating Time: Minimum 2.5 hours at 20°C
Surface Preparation and Application
- Clean and degrease surfaces thoroughly before application.
- Sand and prepare new wood, GRP, or steel surfaces for optimal adhesion.
- Apply 2 full coats undiluted or a single tie coat over epoxy primers.
Hempel is a global leader in protective coatings and paints, trusted in the marine, industrial, and decorative sectors for over a century. Founded in 1915, Hempel is renowned for its innovative solutions, which are engineered to protect and extend the life of surfaces exposed to the toughest environments. Committed to sustainability, Hempel combines cutting-edge research with eco-conscious practices, ensuring superior performance while reducing environmental impact. The brand is a trusted name in the marine industry, providing products like primers, antifouling coatings, and finishes tailored to the needs of boat owners and professionals worldwide.
