Core Mat Bulking Fabric - 39.37 in. Wide

SKU:FG-CM0239

$9.99 USD

$9.99 yd

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110 in stock

Thickness: 2mm

2mm 4mm

Length: 1 Yard

1 Yard Full Roll (87 Yards) Full Roll (43 Yards)

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Coremat® is a lightweight, microsphere-filled polyester bulking mat used in fiberglass and composite laminates to add thickness, stiffness, and print-through control without the weight of extra glass. It wets out easily, conforms to curves and molds, and is compatible with polyester, vinyl ester, and epoxy resins.

Available in two thicknesses: 2mm for weight-sensitive skins and cosmetic laminates where surface quality is critical, and 4mm for heavy-duty panels, transoms, and stringers that need maximum stiffness per pass. Sold by the yard or by the full roll, 39.37 in. (1 meter) wide.

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What is Coremat and how do I use it?

Coremat is a thin polyester bulking mat filled with microspheres that adds thickness and stiffness to a fiberglass laminate while using less resin than extra glass. It also controls print-through so the weave does not telegraph to the surface. Lay it between glass layers, wet it out fully with polyester, vinyl ester, or epoxy resin, and it conforms to curves. Use 2mm for light bulking and 4mm where you need maximum stiffness.