Questionable....

i have an 03 gt,and i really wanted to install rear window louvers.
the only ones i could find were on american muscle.the price is reasonable at 300,but i am questioning the mounting hardware. 3m Adhesive Bonding Tape, Stainless Steel. the reason i have an issue is because i live in texas ,it gets really hot in the summer . so my issue is the 3m heating up super hot ..and loosing its stickyness ,then i go to drive and they come flying off. help?

i see
iv done some minor work with the 3m before( "GT' emblems are black) and have held up pretty good.
ill be doing some more looking around, but i will probley go with those
thanks for the info.

,ill be posting before/after pics