3M plastic and emblem adhesive #8061
Apply small bead to backside, wipe with finger to spread adhesive and remove excess, apply to vehicle, strip of masking tape to hold until dry. Been putting them on that way dang near every day for 22 years at work, no problems yet.
You want to remove most of the wet glue, as squeeze-out will ruin your day.
I tried the #8069 sheets, didn't care for them on anything but the flattest and lightest of emblems.