08/20/2026
Build the mold bigger than the table. Here’s why. 👇
When a customer requests a 105-inch epoxy table, we don’t build a 105-inch mold. We give ourselves extra room to account for the way epoxy resin and live edge slabs behave during the pour.
For this custom woodworking project, we built the box at 107 inches. Those extra two inches give us room to:
• Remove any dips or imperfections near the ends
• Create a natural, organic edge
• Trim the finished table close to the customer’s requested size
• Avoid forcing an irregular wood slab into an exact-size mold
The mold itself is simple: ¾-inch birch plywood, screws, clear packing tape, and silicone.
And here’s a woodworking tip that can save you money: you don’t always need expensive Tyvek tape. The clear packing tape we use costs about $2.50 per roll and works well. It just needs to be replaced whenever the mold is taken apart.
The most important step is sealing every seam, especially the small gaps where the sides meet. We silicone both the inside and outside, so if the inner seal fails, the outer bead can still catch the epoxy.
Once the epoxy cures, we remove the screws, knock off the sides, pry the project from the base, and rebuild the mold for another pour.
A good epoxy table starts long before the resin is mixed. Thoughtful mold construction gives the woodworker enough room to handle movement, imperfections, and the final shape without sacrificing the customer’s vision.
Would you reuse this mold-building method in your woodworking shop, or do you build your epoxy molds differently?
