There is no UV protecting or blocking ingredient in Turtle Wax T240KT
My dad gave me this headlight kit from turtle wax for christmas.
Turtle Wax Headlight Lens Restorer - Clarifying Compound Product Code (SKU): T240KT-RC (50201), T240KTC-RC (50202), T-240KTS-RC (50204)
Ingredients:
Water. CAS 7732-18-5. >65%
Petroleum Distillates Hydrotreated Light. CAS 64742-47-8 7 - 13%
Glycerin. CAS 56-81-5. 1 - 3%
White Mineral Oil. CAS 8042-47-5. 1 - 3%
Nepheline Syenite. CAS 37244-96-5. 10 - 18% (Abrasive feldspar natural source)
There are two processes involved in headlight lens clouding and yellowing. Clouding is abrasion by air wind blast road trash. Yellowing is UV crosslinking in the polymer surface not blocked by deeper material in the plastic compound itself.
Polishing abrasion smooths the trash abrasion. Polishing removes the yellowed layer and exposes un-yellowed plastic to further UV yellowing.