GLAREX 5 – The Best Mylar Shade Material Available in the World! Glarex 5 is a three ply mylar sheet, 5 mils thick, if it were any thicker, it wouldn’t roll.  Glarex 5 has a scratch resistant coating.  The center layer is silver metallic to reflect heat and glare. Glarex 5 is approved by the Coast Guard, IMO, […]