[exxxviii]

Originally Posted by NomoTesla

Would prefer a solution for the side windows. That's where all the heat is coming from, not the windshield. I've found heat-rejecting tints to be somewhat useless and mostly marketing fluff.

High-end ceramic tints have heat rejection similar to the metallic layer in the windshield. It's pretty freaking easy to measure and has been objectively measured many times over.

Lower- and mid-grade tints that only use pigmentation for tinting have almost no heat rejection. That may be your prior experience.