WPC is headquartered in Oak Creek, Wisconsin, and is the sole remaining U.S. manufacturer of strontium chromate, used for the paints and coatings industry, and has operated in Wisconsin since 1975.

Strontium is a soft silvery or yellowish metal that behaves in a similar manner to the other alkaline earth metals in group 2. Although abundant in the Earth's crust — ranking 15th at 340 ppm ...