Or, fill with type 1, then wacker plate it. Later on, fill with Juicy Fruit gum (other brands are available). Leave until hard, hey presto ! your ready to go
For a floor vent or hole, you can either: Tile around it using a vent cover that sits flush with or slightly above the tile surface. Install a recessed or tile-in register that blends seamlessly into the floor for a cleaner look. Just make sure the vent remains accessible and doesn’t restrict airflow.