How do I prepare a silicone mould for resin spoilers?

Getting Your Master Model Ready

Begin with a master model that reflects the final spoiler shape as accurately as possible. The model’s surface should be clean, smooth, and free of flaws since every detail will be transferred to the silicone mould. For best results, apply an even coat of release agent – this prevents the silicone from bonding to the master, allowing for a clean removal when the mould sets. Check corners and intricate areas twice to avoid missed spots.

Mixing and Pouring the Silicone

Choose a high-quality silicone, such as the “Pure Mould” – Translucent Liquid Silicone Rubber for Mould Making. Follow the correct mixing ratio—often 1:1 by weight—and combine components thoroughly to ensure even curing. Pour the silicone slowly in a thin stream at one edge of the mould box. This helps bubbles escape and preserves the fine details required for aerodynamic spoiler elements. Allow the mould to cure fully before demoulding, in line with the product instructions.

Practical Tips for Mould Success

• Secure your master model inside the mould box so it does not float or shift during pouring.
• Degas the silicone mixture if possible, especially for complex shapes.
• After curing, check the mould for flexibility and clear detail before moving on to resin casting.