Sikaflex primer 209 N is a black pigmented low viscosity liquid that dries by reaction with atmospheric moisture. For acrylic & polycarbonate used to prime painted surfaces and plastic substrates prior to bonding with Sikaflex products. Sika® Primer-209 N is suitable for application to the following substrates: - Plastics Acrylic (PMMA) Polycarbonate ABS, etc. - Paints Acrylics Alkyds/melamin