Gyprock Plaster Accelerator is a safe and easy way to speed up the setting times of gypsum-based plaster products such as Base Coat, Cornice Cement and other specialty plasters. Ideal for small jobs where time is an issue, a small amount of Gyprock Plaster Accelerator is mixed thoroughly to the dry or wet plaster mix. Plaster Accelerator should not be added directly to water.