Insulation for opening porthole

Perfect for opening portholes on boats or converted vans, this insulating system for opening portholes from Waterline Design prevents both heat build-up and humidity in the cabin.

Made from polystyrene foam with a highly effective silver-colored heat-reflecting face, this insulation is an excellent complement to the blackout curtains or insect screens already installed on your opening portholes. It fits perfectly as an additional layer between the curtain and/or screen and the window glass.

⚠️ Supplied without porthole, curtain or screen and without fixing system (you'll need to use the suction cup or magnet system already supplied with the blackout curtain or screen)