What is 3M Ceramic IR Series? It is a premium window film that uses ceramic particles to reject heat instead of metal or dye, providing better clarity and higher heat rejection. Does the 5% Limo tint affect my cell signal? No. Because Ceramic IR is non-metallized, it is 100% signal-friendly for your 5G phone and Austin TollTag. How does it compare to 3M Crystalline? Ceramic IR is designed for those who want a darker look with high heat rejection. Crystalline is the "clear" king for maximum heat rejection without the dark appearance. Is the 3M Ceramic IR warranty valid if I move? Yes. When installed by a 3M Certified Dealer like us, your limited-lifetime warranty is honored by any 3M dealer in North America. Which shade should I choose: 5%, 15%, or 25%? If you want maximum privacy, 5% is the choice. For matching factory rear windows on SUVs/Trucks, 15% or 25% usually provides the most seamless look. Why should I choose Sunshades for Ceramic IR? Ceramic films are thicker and harder to shrink. Our founder, Robert Gonzales, is an expert technician who ensures the film is bonded perfectly to the glass without fingers or bubbles and ensures our daily quailty standards.