AQUAPEL Glass Treatment & Rain Repellent: This is an excellent product from PPG Industries. PPG has been manufacturing automotive coatings for more than 80 years. Increases visibility in the rain. At speeds over 35-mph the rainwater beads up and slides off the windshield.
4 to 5 months of durability.
PRICE:  $29 to treat the windshield.

TOP GLOSS Glass Polishing Treatment with Three Coats of Nano-Ceramic Glass Coating:
First, the windshield is machine polished to restore clarity and reduce the appearance of any scratches.

Three coats of ceramic glass coating are applied.  This coating penetrates the top surface of the glass, which gives it excellent durability. Repels dirt, dust, salt, ice, and snow.  Water will sheet off the glass while driving and increase visibility in the rain.  This glass coating has been tested to over 40,000 wiper blade cycles.  Nano-Ceramic Glass Coating technology is superior to RAIN-X and all the other glass treatments you find at the auto parts store.

1 to 2 years of durability.

PRICE:  $79 to polish windshield glass & apply three coats of ceramic glass coating. Glass must be kept dry for three days to allow proper curing.