Thank you for visiting the SONRISE Window Tint website. We at SONRISE Window Tint, L.L.C. will gladly answer any questions you may have. You can contact us at firstname.lastname@example.org or call us directly at 972-231-5077. Because of our relationship with window film manufacturers, we have direct access to some of the engineers and chemical engineers that design and produce the window films we use. So, if we do not know the answer, we know who to ask to find out.