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Facing Layers for Sandwich Panels

The face layers influence many of the properties of sandwich panels. Depending on the application, different materials and configurations are used to achieve optimal results.

The face layers have a significant impact on the appearance, surface quality, corrosion resistance, mechanical properties, and machinability of sandwich panels. Coratec primarily manufactures face layers made of aluminum and fiberglass-reinforced plastic (FRP) and, thanks to its ability to produce large-format panels, can deliver high-quality solutions for demanding applications.

Aluminum Top Coats

Coratec has an extensive inventory of aluminum finish coats. This is necessary because aluminum coils often have long lead times and high minimum order quantities.

Formats Material Thicknesses
Aluminum coils in widths ranging from 1,250 to 2,630 mm The largest portion of our inventory consists of 1-mm-thick top layers

Custom Paint Jobs

For larger quantities, aluminum topcoats can also be custom-coated in coil form. For oven-baked coatings, the maximum width is 1,600 mm. 

Powder coating Liquid paint
Minimum quantity: approx. 300 kg Minimum quantity: approx. 1,200 kg
Delivery time: approximately 8 weeks. For widths over 1,600 mm, significantly larger minimum order quantities are required.

FRP Top Coats

GFRP topcoats are made of glass-fiber-reinforced plastic and can exhibit widely varying properties depending on their composition. These differences result in particular from:

  • Glass content

  • Fabric Reinforcement

  • Matrix material

  • Coating thickness

Standard FRP FRP with glass fabric reinforcement FRP with very high glass content FRP with anti-slip coating
Polyester-based glass-fiber-reinforced plastic Increased mechanical strength Very high mechanical load-bearing capacity Sand infill
Gelcoat surface High-quality surface High-quality surface Slip resistance R11
Thickness: 1.5 mm Thickness 2 mm Thickness 1.5 mm Thickness 1.6 mm
Color RAL 9010 matte Color RAL 9010 Colors RAL 9010 or RAL 9016 Color RAL 7030
Typical minimum order quantity: approx. 600 m². Delivery time: approx. 8 weeks. For larger projects, custom GRP topcoats can also be sourced.

Additional Finishing Options

Send us your plans—we'll assess their feasibility and provide an estimated completion date.

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