Excellent transparent acrylic 2K primer, suitable for the following applications: As a transparent adhesion promoter over non sanded areas. As a filler over treated surfaces. As a first layer (ground coat) for paints with inferior covering abilities (transparent or pigmented). 2:1 mixing ratio with H 729 Hardener for Primers NORMAL. No sanding required within 12 hours of application, if left over 12 hours the fillsealer must be sanded prior to any paint application.