Deep Pour Epoxy Guide: Layer Depth, Coverage & Cure Times
Use UltraClear Deep Pour Epoxy for river tables, thick casts, and deep voids. Pour 1 inch layers as the recommended standard, building up to 6 inches total across layers. This guide explains mixing, kit coverage, layer timing, and cure stages.
Short answer: Use UltraClear Deep Pour Epoxy for thick casts. It mixes 2:1 by volume. Pour 1 inch layers as the recommended standard. Each layer must be at least 1/4 inch thick. Up to 2 inches per layer is for experienced users in a cool, controlled room only. Build up to 6 inches total across layers. Six inches is never one pour.
Is this the right product for your project?
- Yes, if: you are casting a river table, filling a deep void, embedding an object, or building thickness in layers.
- No, if: you are coating a flat bar or table top with a thin finish. Use Bar & Table Top Epoxy for that instead.
Can I add color to Deep Pour Epoxy?
Yes. You can leave the epoxy clear or tint it with compatible Pigmently mica powders or liquid dyes. Test a small batch first to check the color before committing to the full pour.
Can I embed objects in Deep Pour Epoxy?
Yes, for objects that need a deeper casting. Use clean, dry items, and seal porous materials with Bar & Table Top Epoxy first to help prevent air bubbles in the cast.
Can I use it in a silicone mold?
Yes. Deep Pour can be used in silicone molds for thicker castings. For shallow molds or thin pieces, choose the epoxy that matches the mold depth rather than assuming Deep Pour is the right fit.
Does my river table need a protective top coat?
For a table, bar, or countertop that will see regular use, finish the hardened Deep Pour with a Bar & Table Top Epoxy top coat. Deep Pour is not intended to be the final wear surface.
How do I choose the right kit size for a river table?
Measure the space the epoxy will fill, rather than the entire wood tabletop. Use an average river width or measure changing widths in sections. Plan enough Deep Pour for every layer, with extra for waste and kit rounding. A 1.5-gallon kit includes 1 gallon of resin and ½ gallon of hardener; wood seal coats and the protective finish are additional.
Can I mix all the epoxy for a large river table at once?
No. A large kit size is the total project supply, not a single mixing batch. Mix no more than 1.5 gallons combined in one container, keep the 2:1 ratio by volume, and pour promptly. Never combine several mixed batches in one bucket. Plan separate batches and layers according to the Deep Pour instructions.
What temperature should my workshop be for Deep Pour Epoxy?
Keep the room between 60°F and 85°F with humidity below 60%; a controlled 65°F to 70°F room is ideal for deep pours. Maintain the conditions throughout curing. Warm rooms make larger pours react faster, so do not treat 85°F as ideal or assume a 2-inch layer is appropriate at that temperature.
How long should I allow before my river table is ready to use?
Allow time for preparation, every casting layer, and the final protective coating. Wait at least 72 hours after the final Deep Pour layer before demolding, sanding, or top coating; full cure takes 7 to 14 days. A Bar & Table Top Epoxy finish has its own application and curing schedule, so a touch-dry casting is not a finished table.
How much do you need?
For a rectangle, the geometric volume in U.S. gallons is: length × width × depth, all in inches, divided by 231. That is the casting volume only. Seal coats, edges, waste, and rounding up to a kit size are extra.
| One 1.5 gallon kit covers | Area |
|---|---|
| At 1/4 inch deep | 10 sq ft |
| At 1/2 inch deep | 5 sq ft |
| At 1 inch deep | 2.5 sq ft |
| At 2 inches deep | 1.25 sq ft |
Example: A river section 36 inches long, 12 inches wide on average, and 1.5 inches deep is 36 × 12 × 1.5 ÷ 231 = about 2.8 gallons of casting volume, before waste and rounding. For a river, use an average measured width, or measure it in sections if the width changes a lot.
Steps, in order
- Build a sealed, leak-tested mold. Follow the product instructions for mold material and release. Keep any release agent off the wood and off any surface epoxy must bond to. A leak in a deep pour is a large problem, not a small one.
- Seal the wood. Sealing helps stop air in the wood from becoming bubbles in the cast.
- Pour in layers. Pour 1 inch layers as the standard. Wait 12 to 24 hours between layers.
- Finish only when hard. Wait 3 days (72 hours) after the final layer before demolding, sanding, or top coating. The cast is hard at this stage. Full cure takes 7 to 14 days.
Cure times, clearly separated
| Stage | Time | What it means |
|---|---|---|
| Dry to touch | 12 to 18 hours for a 1 inch pour | Time varies with pour depth and amount poured. Touch dry is not cured. |
| Next layer | 12 to 24 hours apart | Pour the next layer in this window. |
| Hard / demold / sand | 3 days (72 hours) | Hard enough to demold, sand, or top coat. |
| Full cure | 7 to 14 days | Full cure. Do not treat 3 days as full cure. |
Food contact, in plain words
Once fully cured (7 to 14 days), UltraClear Deep Pour Epoxy is safe for incidental food contact, like a plate or glass sitting on it. It is not FDA approved, and it is not a cutting or food-preparation surface. Do not cut food directly on it.
Common mistakes
- Pouring the full depth at once because the headline says “up to 6 inches.” That 6 inches is the layered total.
- Pouring 2 inch layers as a beginner, or in a warm room. The 2 inch allowance is for experienced users in a cool, controlled room.
- Calling 3 days “fully cured.” At 3 days it is hard. Full cure is 7 to 14 days.
- Working out volume from area alone, without depth, waste, and kit rounding, then running short mid-pour.