How do I avoid resin leaks in corners?

Why Resin Leaks Occur

Resin is a highly fluid material during application, meaning it will find even the smallest gap or seam. Moulds or formwork for resin tables, art panels, and other pieces often have corners and joints where leaks can escape unnoticed. If these areas are not properly sealed, you can end up with uneven edges or lost resin, which can undermine your results.

Sealing Techniques for Leak-Free Corners

• Apply a silicone sealant: Run a continuous bead of silicone sealant along all inner seams and corners of your mould or formwork. Smooth the bead for a tight seal to prevent resin from leaking out.
• Use release tape: Specialist release tape can also be applied over seams and corners. It provides a second line of defence and allows for easier removal of your finished piece.
• Check before your pour: Once sealed, inspect all join lines and test for gaps. Wait until the sealant has fully cured before you pour your resin.

If you’re working on a project from scratch, a comprehensive kit such as the River-Table Complete Kit includes both silicone sealant and release film along with detailed instructions to help ensure perfectly sealed formwork.

Choosing the Right Resin for Corners

High viscosity resins, such as Art Pro Deluxe, naturally flow less and hold their position, making them easier to control in corners and minimising leaks. For deeper pours, consider a slow-curing product like EpoxyTable 5-Five, which is formulated for stable, thick applications and helps prevent seeping from seams.