Skaters use the wax to make curbs and railings smoother so wood and metal can slide easily against it.
This makes it perfect for grinding against, but it can also be a safety threat to people walking along the street.
Threat to elderly
The council are particularly worried about elderly people, because they've had several complaints from the public and a couple of injuries reported.
Although the council aren't trying to stop skaters skating and no ones been fined yet they are warning they'll come down hard on curb waxers.
"Depending on the seriousness of any accident resulting from the use of curb wax, the county council will either caution or look to prosecute offenders with a maximum fine of £1000," David Bowe of North Yorkshire County Council told CBBC Newsround.