This product is used to insulate larger windows or doors with heavier panes, the MG Extreme product has been introduced using 25mm wide (twice as wide as the standard MG magnet) magnetic and stainless steel strip within the finishing trim available in white and brown (this can be painted to colour match your frame). This has significantly more powerful grip which allows extra thickness of acrylic sheet but the same instantly detachable convenience. Thicker acrylic sheet (4.5 & 6mm) has the additional benefit of being more rigid and giving a better insulation value with the thicker acrylic panel. Easy to fit with few tools.
It is recommended to use surface wipes to clean the window surface before applying the stainless steel strip.