![space block set on lab master space block set on lab master](https://www.nasa.gov/sites/default/files/styles/full_width/public/thumbnails/image/masterimagewebbseries.png)
This is fine, just make sure to pour gently and smoothly enough to avoid entraining air.Boston City Council to hold hearing on lab-space boom
![space block set on lab master space block set on lab master](https://www.thalesgroup.com/sites/default/files/database/assets/images/2021-05/On_orbit_servicing.jpg)
![space block set on lab master space block set on lab master](https://i.ebayimg.com/images/g/9o4AAOSw7VpfzGtd/s-l1600.png)
To preserve flatness and backing thickness defined by the wax mold, any silicone which cured in between the fiberglass and the wax mold reference flats should be left in place, and not scraped away.
![space block set on lab master space block set on lab master](https://www.spacelaunchschedule.com/wp-content/uploads/BlueRedMoon_Yu_960.jpg)
This helps in maintaining flatness of the final reference flats in the daughter mold, as they will be defined entirely by the wax mold surface.