How do I prevent bubbles when wetting carbon fibre?

Choosing the Right Epoxy and Tools

Bubble-free results start with the right products. Opt for a low-viscosity epoxy resin formulated for carbon fibre applications, such as the “Carbon Resin” – Epoxy Resin for Carbon Fiber & Fiberglass Coating. Low-viscosity resins more easily penetrate fibre bundles and help air escape naturally. Use a quality laminating roller to evenly apply the resin and a separate laminating roller or squeegee to work the resin through the fabric, ensuring trapped air is released.

Practical Application Tips

• Apply resin gradually across the fabric using a brush or roller, starting from one side and working methodically towards the other.
• Press the fabric gently but firmly with a laminating roller. Move in small sections—rolling over areas repeatedly will help release stubborn bubbles.
• If bubbles persist, lift the edge of the fabric slightly to let air escape before reapplying the roller.
• Work in a dust-free, ambient temperature environment for best results and minimal bubble formation.

When Bubble Prevention Really Matters

Bubble-free laminates are particularly important for structural components and visible carbon fibre finishes, where clarity and strong bonding are crucial. In professional or high-impact applications, spending extra time to remove air pockets will improve both appearance and integrity.