Usagi, truth be told... Before installing, I laid the new awning out in the sun which helps to get the shipping wrinkles out. Here in SW FL we're in the 90's, so plenty of sun.
I applied 303 Protectant to one side, let it dry. Next day turned it over and did that side. I've used this product for years in the marine industry. One of the best for UV protection. Helps to keep the awning clean too. Later this winter, when I clean and seal the roof, I'll apply the sealant on the exposed area of the rolled up awning also.
2703 Tow Lite
Bonita Springs, Fl. &