Completed polyurethane coating shining in the sun! New waterproof coating replaces a failed, brittle epoxy coating. The parking deck with the failed coating removed During the polyurethane application Untreated concrete deck leads to accelerated deterioration New coating impervious to water, salt, and oil. Deck complete with waterproof coating and anti slip aggregate. Proper maintenance and coating has given this 100 year old parking garage many more years of service.