Best Clear Casting Alternative to Polyester Resin

Why Consider Alternatives to Polyester Resin?

Polyester resin has long been used for clear casting, but its reliance on styrene means strong odours and potential health risks. Many makers now prefer epoxy-based alternatives because they are virtually odourless, non-toxic, and less prone to yellowing over time. Epoxy resins also offer better clarity and resistance to surface scratches, which is crucial for decorative and tabletop applications.

Choosing the Right Epoxy for Clear Casting

The best alternative for most clear casts is a multipurpose epoxy resin. For instance, “Trasparente” clear epoxy resin is formulated for up to 2cm layers, making it perfect for jewellery, paperweights, coasters, and detailed art. If you’re working on deeper projects, opt for products specifically designed for thick pours, such as “EpoxyTable 5-Five” (up to 5cm) or “Epoxytable 10-Ten” (up to 10cm). These resins minimise the risk of overheating and ensure a consistent, glossy finish.

Tips for Successful Clear Epoxy Casting

• Pour in layers – For thicker items, casting in multiple stages reduces bubbles and overheating.
• Work in a dust-free space – Keep your work area clean to avoid blemishes in transparent casts.
• Avoid direct sunlight – While some epoxies feature UV filters, display and store cast objects away from intense light to help them stay clear longer.