Once you've constructed your wood table pouring form, be sure to: Seal the bottom and all the edges with silicone on the seams and then vapor barrier tape on all surfaces (Such as a waterproofing home wrapping tape.)
Clamp down the wood so it will not float when the epoxy is poured lay down a tarp or plastic sheeting to protect the floor from any leaks. Use the calculations below to get a relatively close measurement of the epoxy amount you will need to mix.
First you measure the Length of your wood table in inches, X (multiply) by the average width of the wood “voids” in inches, and then, X (multiply) by the rough thickness in inches. L inches x W inches x T inches = Cubic Inches Cubic Inches divided by 144 = estimated BF (144 cubic inches in a board foot (A Board Foot being 1 sq.ft., 1 inch thick) BF Divided by 2.4, multiplied by 1.2 = Recommended # of kits (1.5 gallons of epoxy will fill about 2.4 BF of space.) (1.2 is used for an overage to be sure you have enough epoxy and do not come up short.)