Gorilla tape comes in white, I've bought it at Menards and it sticks well to the outside of the awning. Looks like it's available here
https://www.walmart.com/ip/Gorilla-Glue-Tape-White-10yd/166045092?wmlspartner=wlpa&selectedSellerId=101007480&adid=22222222228000000000&wl0=&wl1=g&wl2=m&wl3=42423897272&wl4=aud-834279575686:pla-51320962143&wl5=9021498&wl6=&wl7=&wl8=&wl9=pla&wl10=140256681&wl11=online&wl12=166045092&veh=sem&gclid=CjwKCAjw7-P1BRA2EiwAXoPWAxdv8LmWMicR0jFepUCd7YlTUFcYsxRDWAni1a8wHWSehMBY-XauKhoChq4QAvD_BwE
