2x Ultra Slick Engine Assembly Lube 4oz Bottle Permatex 81950 BY BOLD AUTO PARTS STORE Proper lubrication of metal mating surfaces is essential prior to starting a new or rebuilt engine. Ultra Slick™ adheres to component surfaces to prevent scuffing and galling during initial start-up. This high quality formulation meets or exceeds OEM performance specs for engine assembly lubricants. .