United Chemical Startup Treat™ Advanced Plaster & Scale Protection | SUST-GALUnited Chemical Startup Treat SUST GAL is a concentrated pool start up treatment designed to safeguard new plaster and interior pool finishes throughout the filling and curing process. Its specialized formula uses effective chelating agents and scale inhibitors to capture metals, calcium, and hard water minerals before they can create stains, surface mottling, or scaling. By stabilizing mineral content during initial fill, it helps reduce plaster dust