Keep butyl tape in a fridge when not needed or at least over night before you install... makes a big difference. I usually give it a week or two to squish out before trimming and sealing.
FYI: don’t seal the bottom of the window frame, let’s water drain out is any gets in. Definitely tape all the way around, but just dicor seal the top and sides.
2018 Black Rock 24kts, 300 watts Solar, 4-230ah gc2’s
2008 Dodge 3500 4x4, 6.7, delete, LB, 6 spd man. Firestone bags.