Production for the first season was thought up from 1998 to 2000 and produced from 2002 to 2003 Production for the second season was thought up from 2000 to 2003 (the latter year was when it was produced) and the episodes were completed in 2004, and they were re-aired from 2006 to 2007. It was originally broadcast as videos before airing on TV in 2005.

Johnny

• Model: "Dodge Viper"

Johnny is cool and daring. He loves high speeds and a glossy shine. His best friends are Derek, Cali, Maria, and Miles. He is 12 years old. His favorite thing to do is race to Squeakies Car Wash to get “squeaky clean” and show off his shine.

Cali

• Model: "1999 Mercedes-Benz R170"

Cali is a stereotypical “valley girl”. She is 16 years old. She hangs out with Johnny and Maria, and loves shopping.

EJ Mini

• Model: "1974 Morris Mini"

One of the “little cars,” Eric Jacobson "EJ" Mini puts his all into everything he does. He is 6 years old. He tries hard to keep up with the big guys – and wants to be just like Johnny when he grows up. His best friend is his classmate Izzi.

Issadora

• Model: "1957 BMW Isetta 300"

Issadora (Izzi) is innocent, bright eyed and curious about everything. She is a 7-year-old kid who loves to play with EJ, but can get frustrated at being the littlest and not always able to do what the others can.

Professor[3]

• Model: "1950 Citroën 2CV"

Professor's inventions would be world-renowned, except they usually go awry. He is 28 years old, and it's a bit eccentric and very analytical but with a heart of gold that makes him beloved by all.

Franklin

• Model "1931 Tatra T80"

Old and wise at 28 years old, Franklin has lived a full life, and speaks from experience to give advice on almost anything. He and the Professor are good friends and both act as mentors to the “kids.”

Miles

• Model: "1970 Volkswagen Karmann Ghia"

Miles is the conscience of the group who is 14 years old and knows what's right and tries to steer the others in that direction. Miles' maturity gives a balance to the friendship with Johnny and Cali.

Maria

• Model: "2003 Jeep Liberty"

With her love of adventure and four-wheeling, Maria is the trailblazer of the group. She is 18 years old and coaches the little cars' soccer team and has a job at the park. Maria is friends with Derek.

Derek

• Model: "2000 Dodge Ram"

At 19 years old, Derek is the biggest and toughest of the group. With his mild manner and gentle spirit, Derek is often the group's peacemaker and mediator.

Elrod

• Model: "1923 Austin 7"

Century-old Elrod fught in the great war with CJ Willy, Franklin, and Mr. Morgan. He lived alone for many years after the war and later reconciled with his friends. He currently is the owner and operator of Elrod's Mini Golf.

CJ Willy

• Model: 1942 Willys MB

Franklin, Mr. Morgan, and Elrod's drill instructor and sergeant in charge during the great war. Lost his life in the line of duty. His image is cast in bronze as the statue in Memorial Park.

Lug Nut

• Model: "1934 Triumph Dolomite"

Vaudeville performer who, along with his comedy partner, Dip Stick, teach Miles that enthusiasm is the secret of success.

Billy

• Billy was lost in the wilderness at a young age and was raised by Big Horns. When the other cars found him on a camping trip, they brought him back to the City of Auto and learned to see all the wonderful things in their city through new eyes.

Mr. Morgan

• Mr. Morgan is the sports referee.

Wet Cement completed 27 episodes for the second season.