Extend the setting time of all types of finishing plaster by up to 60 minutes. Ideal for plastering larger areas or for working in hot environments. Simply mix with gauging water, then add finishing plaster as normal. 1 sachet for every 25Kg of plaster. Extratime is a chemical additive for use with finishing plasters that slows the curing process by inhibiting crystal formation. It is recommended for moderate lengthening of finishing plaster setting times, providing an extension of 30-60 minutes depending on ambient temperature, humidity, and the surface being plastered. Manufactured and tested to BS EN 13279-2 : 2014.