Molding kit for resins

The Resin Moulding Kit brings together in a single order everything you need to go from the original to a silicone mould and obtain copies in rigid polyurethane resin: condensation silicone, two-component resin, release agent and industrial plasticine. It is the most straightforward solution if you are starting out in mould making or want a complete working kit without having to calculate quantities separately.

Kit contents

What it is used for

This kit is designed to reproduce small and medium-format pieces in a rigid, durable material. The complete workflow goes from the silicone mould to the resin copy, all using professional-quality materials in quantities suited to getting started without waste.

• Reproduction of figures, busts and sculptures for scale models and miniatures
• Copying original pieces in rigid resin for decoration and art
• Creating accessories and props for special effects and cosplay
• Rapid prototyping of small-format pieces
• Educational and introductory projects in mould making and casting
• Reproduction of reliefs, stamps and objects with defined contours

How to use it

1. Prepare the original: make sure the piece is clean, dry and free of dust. Apply Ferosil V32 release agent in thin layers over the original if the material requires it, allowing to dry between coats.
2. Build the containment wall: use the included industrial plasticine to define the pour area around the original. Make sure there are no leaks at the base.
3. Mix the silicone: add the catalyst from Easyl 3520 to the base at the indicated ratio (approximately 5% by weight). Mix for 2–3 minutes with slow movements to avoid incorporating air.
4. Pour the silicone: pour over the original in a thin, continuous stream, starting from the lowest point. This minimises bubbles. Allow to cure at room temperature for the indicated time (generally 12–24 hours).
5. Demould the silicone: once cured, remove the plasticine wall and carefully separate the mould from the original. The silicone is flexible and does not require excessive force.
6. Apply release agent to the mould: before the first casting, apply Ferosil V32 to the inside of the mould to aid resin release.
7. Mix Feropur PR55+E55 resin: combine parts A and B in a 1:1 ratio by weight. Mix for 30–60 seconds until a uniform colour is achieved. Work quickly — the working time is short.
8. Pour the resin: place the mould in a stable position and pour in the mixed resin. You can gently agitate the mould to eliminate bubbles.
9. Demould the copy: wait for the indicated cure time for the resin and carefully extract the piece. The silicone mould can be reused for multiple castings.

Tips and advice

Temperature and working environment

Easyl 3520 condensation silicone cures by ambient humidity: the higher the temperature and humidity, the faster it cures. Below 18 °C the process can slow down considerably. Always work in an environment between 20 and 25 °C for predictable results. Feropur resin is also sensitive to temperature: in cold environments viscosity increases and pouring without bubbles can be more difficult.

Bubble control

The main problem with first moulds is usually the appearance of bubbles. For silicone, always pour in a thin stream from a certain height. For resin, mix slowly and pour by tilting the mould so the resin advances gradually. If you have access to a vacuum chamber, degassing the silicone before pouring noticeably improves results, although it is not essential with Easyl 3520 for simple pieces.

Mould reuse and storage

Condensation silicone moulds can be used for many castings if properly maintained. Apply Ferosil V32 release agent every few castings, especially with polyurethane resins, which tend to stick to the mould if it is not well protected. Store the mould in its natural shape, without deforming it, away from dust and direct light.

Frequently asked questions