EPS (Expanded Polystyrene Foam) and XPS (Extruded Polystyrene Foam), often referred to as Styrofoam, Roofmate or insulation board, are inexpensive materials that are easy to work with. These materials can be easily cut with a hot wire cutter, a knife, a saw or even sandpaper. Because Styrofoam is soft, it is susceptible to damage and has little strength.
To reinforce EPS/XPS Styrofoam or Roofmate, a fibreglass coating can be applied in combination with epoxy resin. In this article we explain how to reinforce Styrofoam with epoxy resin.
Epoxy resin is often used in combination with glass fabrics, which are available in different structures: square weaves and twill weaves. Square weaves are ideal for flat surfaces, while twill weaves are better suited for curved shapes. After curing, epoxy can be finished with Double Coat paint, industrial paints or acrylic paints to achieve the desired effect.
An advantage of epoxy resin is that it can be applied in a thinner layer than, for example, polyester resin, which results in a lower weight.
To fibreglass Styrofoam with epoxy resin, follow these steps:
Once the epoxy has hardened, you can finish the object with, for example, Double Coat DD paint or another suitable paint of your choice.
Do you have any questions about reinforcing polystyrene? Please feel free to contact our product specialists. We will be happy to provide you with expert, no-obligation and honest advice tailored to your needs.
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