WR500 + MAT300 Combination Fabric
The term WR500 + MAT300 combi refers to a complex fiberglass reinforcement that combines a 500 g/m² Woven Roving (continuous filament fabric) with a 300 g/m² Chopped Strand Mat (CSM). These layers are stitched together with polyester thread to form a single 800 g/m² reinforcement fabric.
Key Advantages
Improved efficiency: Allows a structural reinforcement layer and a finishing mat layer to be applied in a single operation.
Excellent resin bonding: The polyester stitching that holds the layers together eliminates the need for chemical binders, allowing rapid resin penetration and wet-out.
Versatility: Highly conformable, making it suitable for corners, contours, and curved mold surfaces.
Typical Applications
Marine repair and manufacturing (hulls, decks, and other composite structures).
Production of large composite parts and molds.
Tanks, swimming pools, vehicle body panels, and automotive components.
Processing Guidelines
Compatible resins: Must be used with polyester or vinyl ester resins.
Lay-up orientation: The mat layer is typically placed directly against the gelcoat to prevent the woven pattern from printing through to the surface, with the woven roving facing outward.
Tools required: A consolidation (bubble-buster) roller should be used after resin saturation to remove trapped air and ensure proper laminate compaction.
