Foam and Core

Foam and Core

Foam and core materials can add shape, thickness, stiffness, or flotation to a composite project without unnecessary weight.

Explore Fibre Glast foam sheets and blocks, mix and pour polyurethane foam, and sandwich core materials for making plugs and molds, filling cavities, and building lightweight parts.

Shop by Category

Foam and Core Materials for Composite Projects

The right foam or core depends on what you’re building. Some materials are made to be cut and shaped into plugs or patterns; others fill enclosed cavities or become the center layer of a composite panel. Explore the three collections below to find a material suited to your process.

Foam Sheets and Blocks

Browse foam for materials that can be shaped or incorporated into composite parts. The collection includes polyisocyanurate foam sheets and blocks for carving plugs and patterns, as well as foam core options such as Divinycell vinyl foam and grid-scored PET foam sheets.

Mix and Pour Foam

Mix and pour foam expands after its components are mixed, making it useful for filling cavities. Fibre Glast offers polyurethane foam options for applications including flotation and reinforcement. Cured foam can also be shaped for plugs, models, and other projects. Check the product details when choosing a density for your intended use.

Sandwich Core Materials

A sandwich panel places a lightweight core between composite skins, often fiberglass or carbon fiber, to add thickness and stiffness without making the entire panel solid laminate. Shop sandwich core materials, including foam, end-grain balsa, honeycomb, and structural panels. Compare each product’s material, form, and properties before selecting a core for your part or repair.