LOCTITE^® SF 7515 is an amber, water-based surface treatment that delivers temporary protection (up to 48 hours) against flash rust on materials including aluminum, zinc, zinc alloy and cold rolled steel surfaces. It can also be used on blasted metal surfaces as short-term corrosion protection before coating, and to improve corrosion resistance of the final coated metal. It’s a no-rinse treatment for spray and wipe application.