3M Scotchkote Epoxy Ceramic HD Surfacer HG 519Product Features Designed for application by trowel or spatula at thicknesses. Designed for use to rebuilding worn hoppers, chutes, pipe elbows and other equipment subject to aggressive attack from dry solids and slurries. Excellent adhesion to correctly prepared metal surfaces. Surface Preparation All dust and loose material should be scraped away. Oil and grease should be removed with 3M Scotchkote Cleaner 020. Surfaces should then be abrasive blast