[Russky]

What do you guys use (if any) to UV-protect older/used kites?

I've heard of "303 Aerospace Protectant", looks like it's a good candidate.
My concern is if it's going to affect integrity of the kite's rip-stop polyester fabric, seams, bladders/valves, etc.

Anybody have any experience with this or other products in regards to application to kites?
What is that product they soak the fabric for new kites?