USG Retarder 2.5-lb Bag

Gypsum plaster retarders extend the set time of conventional plasters, veneer plasters, lime finish plasters and setting-type joint compounds. By slowing the chemical crystal formation that causes gypsum plaster to set or harden, gypsum plaster retarders allow more time to complete each job. Gypsum plaster retarders easily disperse into water prior to adding plaster.