CPC 1K High Build Primer Surfacer is a high build, anti-corrosive primer, alkyd resin based primer for use with alkyd enamels and 2-pack topcoats. It is relatively fast drying with excellent durabilty and can be re-coated within 1 hour as a "Wet on Wet"applicationand does not need to be sanded to give excellent topcoat adhesion and gloss holdout. PRODUCT DESCRIPTION SUBSTRATES & PREPARATION CPC 1K High Build Primer Surfacer can be applied over the following substrates once they have been prepared as follows: CPC 1K High Build Primer Surfacer is available in a range of colours utilizing the SELEMIX® universal tinter system.