ICE CAST will allow to cast thicker layers, as this resin does not heat up as much during curing. Moreover, air bubbles can be removed very easily with a blowtorch burner or a suitable heat gun.
On the other hand, ICE THIN, should not be poured with a thickness greater than 1 in (2.5 cm). This is due to its rapid increase in temperature with respect to the thickness of the poured layer. You should be aware that a too high temperature increase in your mixture has consequences (mass effect). In addition, if it’s to thick, air bubbles are difficult to rise and escape due to the highly viscous consistency which arrives quickly during the cure.
As a general rule, ALWAYS observe the recommendations on the product packaging. This information should tell you what total amount of material to use for each operation. If you exceed the maximum thickness, the heat generated in the curing process cannot escape fast enough. This results in unsightly stains caused by uneven curing of the compound.