EternaBond® EternaPrime® is a solvent-based product available in convenient aerosol spray or brush-applied options. It is specifically designed to enhance adhesion on surfaces that are difficult to clean due to dirt or rust. However, it should not be used on PVC surfaces. EternaPrime® is primarily used to prepare surfaces for the application of all EternaBond® tapes, especially in cold temperatures. It is commonly used in conjunction with EternaBond® Roofing Repair Tapes.