How to Prevent Bubbles in Infusion Resin

Q: Best Practices for Mixing and Application

Mix slowly: Stir components gently to avoid introducing air. Sudden or vigorous mixing increases the risk of bubbles. Degas when possible: If equipment is available, vacuum degassing can eliminate residual bubbles before infusion. Even fabric wetting: Carefully lay up and impregnate fabric to avoid air pockets. Patience and even pressure support a consistently smooth result.

← Back to How much cobalt is needed for infusion resin?

Bubbles in infusion resin can mar the finish of composite projects and weaken their structure. By following a few careful practices, you can achieve a smooth, professional lamination free of unsightly air pockets.

Select the Right Resin

Choosing a low-viscosity, specialist infusion resin is essential for bubble control. Thinner resins flow more easily around fibres and into intricate areas, reducing trapped air. For best results, opt for products specifically designed for even fabric impregnation, such as the Carbon Resin epoxy system.

Best Practices for Mixing and Application

Mix slowly: Stir components gently to avoid introducing air. Sudden or vigorous mixing increases the risk of bubbles.
Degas when possible: If equipment is available, vacuum degassing can eliminate residual bubbles before infusion.
Even fabric wetting: Carefully lay up and impregnate fabric to avoid air pockets. Patience and even pressure support a consistently smooth result.

When This Matters Most

Bubbles are especially problematic in visible laminates or high-stress parts where clarity and integrity are vital. Meticulous bubble prevention becomes crucial for carbon fibre, fibreglass, or decorative table pours.

Related guides

How Much Cobalt Is Needed For Infusion Resin

Proper methods for bubble avoidance ensure your infusion resin projects are as clear and robust as possible. For more guidance on infusion resin and additives, see our main overview on resin infusion essentials.