Sandwich Core Materials are lightweight, structural layers that are embedded between laminate layers in order to build bulk and strength for a part—without adding significant weight. By employing sandwich core materials in your part or mold, you can achieve much higher flexural strength and flexural modulus than using skin laminates alone.

Want to learn more about Sandwich Core? Visit the Learning Center and read our white paper, Guidelines for Sandwich Core Materials.

Click on a product image below to get more information and view pricing.

  • Nomex® Honeycomb

    Lightest Possible Construction
    4.5 star rating
    Fabricators use this sandwich core when high strength-to-weight ratios are required. This honeycomb is an...
  • Divinycell DIVINYMAT

    Resin Flows Easily for Vacuum Bagging
    5 star rating
    Divinymat has been engineered specifically for the resin infusion process and serves as both a sandwich core and a...
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  • End Grain Balsa

    Conforms to Most Curves – Marine Grade
    4.8 star rating
    End Grain Balsa is the most widely used core material, and is best suited for dynamic structures where performance...
  • Vinyl Foam: Divinycell 3 lb. Density

    Superior Mechanical and Insulative Properties
    5 star rating
    DIAB closed cell vinyl foams are valued for their superior structural and mechanical properties. These foams are...
  • Vinyl Foam: Divinycell 4 lb. Density

    Strikes Balance Between Strength and Weight
    4.5 star rating
    DIAB closed cell vinyl foams are valued for their superior structural and mechanical properties. When used as a...
  • Vinyl Foam: Divinycell 5 lb. Density

    Highest-Strength Sandwich Core, Form with Heat
    4.5 star rating
    Looking to make a strong composite part? DIAB closed cell vinyl foam is an ideal sandwich core where ultimate...
  • 2 Lb. Polyisocyanurate Foam Sheets

    Easy Cut and Shape for Pattern-Making
    5 star rating
    Our 2 lb./cubic foot Polyisocyanurate Foam Sheets are best suited for moldless pattern-making and for sandwich core...
  • 6 Lb. Polyisocyanurate Foam Sheets

    Easy Carve for More Detailed Patterns and Molds
    5 star rating
    Our 6 lb./cubic foot Polyisocyanurate Foam is a rigid, closed-cell foam used in insulation, sandwich core, and...
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Sandwich Core materials from Fibre Glast include:

  • Nomex® Honeycomb — Offers the very best strength-for-weight ratio in this category; flexible, fire retardant, and delivers good impact resistance.
  • End Grain Balsa — Conforms to practically any simple curve and most gradual curves.
  • Foam — Includes sheets of vinyl and polyisocyanurate, as well as mix-and-pour foam; all are closed cell and resist water, gas, and oil.

All of the Sandwich Core materials in this category are compatible with epoxy, vinyl ester, and polyester resins, and can be used for most lay-up techniques, including vacuum bagging and infusion.

To see how Sandwich Core is used during the vacuum bagging process, visit the Learning Center and read Vacuum Bagging Equipment & Techniques. You can also view An Introduction to Sandwich Core Materials on the Fibre Glast Blog.

You can place your order right here on our website or, if you have any questions, call 1.800.838.8984 | 8 a.m. - 5 p.m. EST Mon-Fri.

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