Thermal washers are needed to attach polycarbonate sheets to the frame at specific points. This is one of the necessary components, which includes the washer itself made of plastic,
a leg along its width, seals and a cap for snapping.
The height of the plastic washer matches the thickness of the polycarbonate sheet.
The polycarbonate tape is designed to protect the panels from moisture seepage and dust penetration into the cells.  The tape has special microfilters thanks to which well seals a design.