EasyGel FX HR20 - Fast Curing and High Strength -

EasyGel FX HR20 is a two-component platinum (addition) silicone with Shore A20 hardness formulated for production environments where time is a critical factor. With only 10 minutes of working time and full demould in 25 minutes, it combines ultra-fast curing, high tear resistance and minimal shrinkage to deliver faithful reproductions even in geometries with fine detail. Its 1:1 mix ratio by weight and volume simplifies the process and eliminates weighing errors in production.

Technical specifications

What it is used for

EasyGel FX HR20 is designed for mould-making professionals, special effects artists and serial production users who need a fast, durable silicone with excellent detail reproduction. Its Shore A20 provides the flexibility needed to demould parts with undercuts without compromising copy fidelity, and its translucency makes it easy to spot bubbles and monitor mould fill at a glance.

• Serial production moulds with short demoulding cycles
• Special effects (FX) for film, television and theatre: prosthetics, character make-up and props
• Moulding of sculptures and models with fine texture or complex relief
• Reproduction of parts with pronounced undercut geometries
• Mould making for resins, waxes, plasters and low-temperature materials
• Rapid prototyping where cycle time is critical
• Duplication of originals in character make-up and artistic FX workshops

How to use it

1. Prepare the original: make sure the model surface is clean, dry and free of contaminants. Apply release agent if the material requires it. Confirm that the original contains no sulphur, latex or tin (see warning).
2. Weigh the parts: mix part A and part B in a 1:1 ratio by weight or by volume. Use a precision scale or graduated containers to ensure the exact ratio.
3. Mix: stir slowly and evenly for at least 2 minutes, scraping the sides and bottom of the container thoroughly. Avoid introducing air. If you need to increase viscosity for vertical or inclined surface applications, add Thixo Additive at the recommended ratio.
4. Degas (optional but recommended): if you have a vacuum chamber, degas the mixture for 1–2 minutes before pouring to eliminate microbubbles.
5. Pour or apply: you have 10 minutes of working time. Pour in a thin stream from the lowest point of the mould or apply in layers if brush-coating. If you wish to pigment the silicone, incorporate Key-Pigments before pouring.
6. Allow to cure: the mould will be ready to demould after 25 minutes at 25 °C. Do not handle the piece before curing is complete to avoid distortion.
7. Demould: carefully remove the piece taking advantage of the flexibility of the Shore A20. The mould is then ready for the next production cycle.

Usage tips

Control temperature to adjust working times

The 10-minute working time applies at 25 °C. At higher temperatures curing accelerates and handling time decreases noticeably; at lower temperatures it extends. If you are working in summer or in a warm workshop, pre-cool the components before mixing. If you need more handling time for complex projects, work below 20 °C or divide the pour into several stages.

Inhibition test before each new original

Before making the final mould on a new model, mix a small amount of EasyGel FX HR20 and apply it to a discreet area of the original. If after 30 minutes the silicone is still tacky or soft at the contact point, the material is inhibiting the cure. In that case, seal the surface with acrylic spray lacquer or water-based varnish, allow to dry completely and repeat the test. Remember that you cannot use tin silicone as a base material or as a containment mould if you are going to pour platinum over it.

Optimise performance in serial production

The 25-minute cycle allows multiple castings in a single working day. To maintain copy quality, clean the mould between castings and apply release agent according to the material being reproduced. If the mould will work with deep undercut geometries, consider reinforcing it with a rigid counter-mould to avoid accumulated distortion after many cycles. For FX character work where you need to blend prosthetic edges into skin, consult the use of a specific encapsulant.

Frequently asked questions