I don't recognize which type of 3M tape you've got but I'm really glad to hear that it worked and I hope it continues to do so. Nevertheless, allow me to share my long time experience mounting dash cams. I have a strong hunch that other members here have had similar experiences.
Depending on the installation, the mounting surface, the camera, the environment, etc., what appears at first to be a successful installation may end in disappointment sooner or later. Many a time I've carefully mounted a camera and everything seemed great! Then, maybe in a few hours, days, a week, or even a couple of weeks, you come back to your vehicle and find the camera dangling from its cable, or peeling off the mount, or on the floor! The trick is to achieve a permanent bond and that is sometimes a challenge, especially with something like textured plastic. Sometimes the bond seems fine but after a temperature change something starts to go wrong. Or maybe you drive over a bumpy road and that's when a poorly bonded tape decides to let go. You never know how good a bond you've achieved until the camera has been installed for a while.
Also, keep in mind that VHB tapes (depending on the product) can take up to 72 hours after initial application before their full bonding cure is achieved. 3M advises waiting until the full bonding is achieved until you apply weight. Temperature makes a big difference in how long a period you need to wait but from my experience I find that once I apply VHB tape it is best to wait at least overnight before actually sticking your camera onto a freshly mounted camera mounting plate. Of course, if the mount is integral with the camera like a rear cam you have no choice but a small light weight camera should probably be ok. MIght be a good idea not to drive around too much until the full bonding process (cure) happens.
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