How soon can rubber void formers be removed?
The recommended period is normally 12 hours but it depends on the air temperature and type of mix and may be any time between 4 and 15 hours. If too long a period elapses there may be troubles with sticking. If the time to remove the void former falls on a nonworking day and it is inconvenient to remove it, the void former should be deflated on schedule ready for later removal.