Can I use your product "3 mm Reflective Insulation roll, Foam Core Radiant Barrier, Thermal Insulation Shield - Engineered Foil" on windows or patio doors ? I'm wondering if this material will heat up enough to cause the glass in crack windows?

SmartSHIELD-3mm- Engineered Foil is a great choice for windows or patio doors insulation. It will reflect 95% of sun heat out, will NOT heat up the glass to the temperature when the window glass can crack. Absolutly safe to be used on window glass.

Yes you can use it