Silver-Blue engine block paint for later Universal diesel engines.
Universal engines were painted this color after about 1986, when they switched from a bronze. Don't assume your boat's engine uses this color based only on the year of your boat. Catalina might have had an engine painted a different color on the shelf which they used until their supply was exhausted at a later date. The best test is to use the old mark 1 eyeball to verify!
Since this is classified as a hazardous material, it can only be shipped via UPS ground to the continental US and Canada. It cannot be shipped to foreign addresses, Hawaii or Alaska.