Mark the cut line on the foam
Use a sharp utility knife or foam cutter
Place the foam on a flat, stable surface
Hold the foam firmly in place
Cut slowly along the marked line
Use multiple light passes for thicker foam
Keep the blade straight and steady
Replace dull blades as needed
Use a straightedge for straight cuts
Use a serrated knife for thicker or denser foam
Use an electric hot wire cutter for clean shaped cuts
Wear safety gloves and eye protection
Work in a well-ventilated area when using heat tools
Clean up foam scraps after cutting