One product was diluted to 5% and heated to 131 F. Stainless steel coupons were coated with four contaminants. Keystone KSL 111 (64742-47-8), Keystone Lubricant Moly 23 (64742-47-8, 9003-29-6), Z66 Coloring Composition buffer (1344-28-1), and Alpha RMA flux