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When making a table with wood and coloured resin, ensuring that your formwork is fully sealed is crucial to prevent leaks, wasted resin and ruined results. A careful approach saves hassle and material.
Why Is Thorough Sealing Important?
Epoxy and deep pour resins are highly fluid when mixed, making them prone to seeping through even tiny gaps in your formwork. Uncontrolled leaks can cause difficult clean-ups, loss of valuable resin and compromise the integrity of your project. A tightly sealed form acts as a reliable mould, maintaining the intended shape and depth of your table.
Best Practices for Sealing Your Formwork
- Use suitable materials: Melamine-coated boards are commonly used for formwork because resin doesn’t stick to them easily and they’re less likely to warp.
- Seal all joints and edges: Applying a quality silicone sealant to every seam and corner stops resin from escaping. Allow the silicone to cure fully before pouring your resin.
- Consider a release film: Lining the form base with a release film makes demoulding easier, as found in the “River-Table” complete kit.
Checking for Gaps and Testing Before Pour
Once your form is assembled and sealed, inspect all joints closely for small openings or imperfections. It’s a smart idea to pour a little water into the empty mould for a leak test—simply dry out afterwards and touch up any leaks with more sealant. Only proceed with resin once you’re confident of a complete seal.
When This Matters Most
Proper formwork sealing is particularly vital when using deep pour resins, as they stay fluid longer and can exploit the smallest gaps. Projects like river tables, which may require up to 5cm of resin per pour, benefit greatly from taking extra care at this stage.
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Mastering the basics of sealing your formwork lays the foundation for a stunning wood and coloured resin table. See the full guide for more tips on formwork and resin table techniques at our main how-to page.