No needfor silicone in between each use. Simply tap the form with a mallet to release the cured epoxy. Pour up to 3.25 deep. Mold releaseis not necessary but can be used to prolong the life of your mold.
30" diameter by 3.25" tallno sealhdpe form. 36" diameter by 3.25" tallno sealhdpe form. 42" diameter by 3.25" tallno sealhdpe form. 48" diameter by 3.25" tallno sealhdpe form. Note:putting the mold on any elevated platforms such as saw horses or on blocks to pour causes stress on the welds which will cause them to leak.
The best practice for the mold is to have it on a flat surface when pouring and curing.