SANDWASH REFINED FINISH Bomanite Sandwash Finish is an architectural exposed concrete with a fine exposure depth using non-native quartz aggregates bond in Bomanite Color Hardener that is surface seeded on concrete. The Sandwash Refined System utilizes specialized concrete mix designs, dry shake color hardener and/or integral color, topical treatments and advanced application procedures to produce a finished product that showcases the fine aggregate. Topically applied products such as Bomanite Con-Color and Chemical Stain are compatible with Sandwash Refined.