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The Right Resin for Every Timber Project: Low, Mid & Deep Pour Explained
Whether you’re sealing timber, casting a river table, or restoring an heirloom piece, choosing the right epoxy viscosity determines your finish. Here’s how to match the perfect formula for your next woodworking project.
Understanding Resin Viscosity in Woodwork
When working with timber, the resin’s viscosity—how thick or thin it flows—affects everything from penetration depth to bubble release and final clarity. At Resin Shop, our EpoxyPro EP4010 Low Viscosity, EP4020 Mid Viscosity, and EP4030 Deep Pour systems are designed to handle everything from fine surface sealing to thick-pour castings with professional clarity and strength.
Low Viscosity: Penetrate, Seal & Strengthen
Best for: sealing, laminating, timber repairs, and thin flood coats.
Low-viscosity resin like EpoxyPro EP4010 is thin enough to soak deep into timber pores and cracks, bonding at the fibre level. It self-levels beautifully and releases bubbles quickly—ideal for sealing live-edge slabs before your main pour or for achieving a flawless top coat on smaller wood projects.
- Excellent flow and surface wetting.
- Penetrates cracks and voids for structural reinforcement.
- Fast bubble release—great for clear finishes.
Pro tip: Always seal porous wood before casting to stop bubbles rising through your main pour later.
Mid Viscosity: Build & Protect
Best for: furniture coatings, benchtops, tabletops, and structural bonding.
The mid-viscosity formula EpoxyPro EP4020 balances flow and body. It’s thick enough to hold on vertical edges and corners without running, yet fluid enough to self-level for an ultra-smooth finish. It’s the workhorse of the workshop—perfect for filling larger voids, coating wood slabs, or laminating veneers and timber joints.
- Great control during brushing and rolling.
- Ideal for thicker flood coats up to 10 mm per layer.
- Durable, glassy finish with excellent adhesion to wood and composites.
For benchtops or showpiece slabs, lightly sand between coats for optimum interlayer bonding and that “wet-glass” clarity.
Deep Pour: Cast, Create & Impress
Best for: river tables, thick slabs, and artistic castings.
For dramatic depths and crystal clarity, EpoxyPro EP4030 Deep Pour is engineered for thick applications—up to 50 mm per pour. The slower cure reduces exothermic heat, preventing cracking and yellowing while maintaining superior transparency. It’s your go-to for large pours, embedded objects, or clear casting that showcases wood grain and pigment effects.
- Extended pot life for large pours.
- Minimal heat build-up and bubble formation.
- Ultra-clear optics for deep river effects.
Combine EP4030 with your sealed base layer of EP4010 for the perfect “seal and fill” system—strong, stable, and clear from edge to edge.
How to Choose the Right One
If you’re unsure which system fits your project, start with the question: “How deep am I pouring?”
| Project Type | Recommended System | Pour Depth |
|---|---|---|
| Timber Sealing / Flood Coat | EP4010 | Up to 3 mm per layer |
| Furniture Coating / Tabletop | EP4020 | Up to 10 mm per layer |
| River Tables / Casting | EP4030 | Up to 50 mm per pour |
Pro Tips for Timber & Epoxy Success
- Temperature matters: keep workspace around 22–25 °C for smooth curing.
- Seal first: always apply a thin coat to close timber pores before deep casting.
- Layer smartly: deep pours cure slower — plan for multiple stages if over 50 mm.
- Sand between coats: promotes mechanical keying for crystal-clear adhesion.
- Measure precisely: follow 2:1 mix ratio by volume — accuracy = strength + clarity.
Get the Tools to Make It Easy
Plan your pour using our Resin Calculator, explore guides in the Learning Hub, or reach out for bulk and trade pricing on your next timber or casting project.
