303 is safe on all interior surfaces including leather, vinyl, rubber, plastic, weather stripping, etc. I would use this in addition to the windshield reflector.
http://www.303products.com/303r-aero...tant-32oz.html
303 is THE LEADER in UV Screening Technology. 303 Aerospace Protectant really is like "SPF 40 Sunscreen ... For Your Stuff." Regular use gives 100% Prevention of UV caused slow-fade with regular use. No other "protectant" beautifies as intensely, protects as powerfully or lasts as long.
The World's Most Manufacturer-Recommended Product:
Because of its enduring cosmetic properties, the resistance of 303-treated surfaces to dust, soiling, and staining, its water repellency and unparalleled protective characteristics, manufacturers worldwide recommend 303 Aerospace Protectant.
303 Aerospace Protectant keeps UV-sensitive materials "like new" year after year.
Use on Rubber: Tires, neoprene, latex, door and trunk seals, weather-stripping, EPDM rubber roofs, CV boots, waders, wet suits. Vinyl: Convertible tops (and the clear vinyl windows), isinglass, marine seating, tonneau covers, car bras, covers, spa covers, pool covers. Inflatable boats: Hypalon, PVC and urethane blends. Gelcoat fiberglass: Boats, RV's, snowmobiles, jet ski's.Plastics, acrylics, polycarbonates: LexanŽ and acrylic panels, windows, , windshields, covers. Carbon-fiber/resin composites: Fishing rods, "nude" bike frames. Finished leather: Upholstery, motorcycle leather, trim, tack, fine apparel. Pool & Patio: Plastic furniture (not fabric), pool inflatables, slides, covers. Sailcloth: DacronŽ and monofilm.