Polycoat products, Polyureas have applications from Tank Liners to Parking Decks, and Amusement Park Rides to Movie Props. The durability and ease of application are key components to ultra-fast curing Polyurea.
Ask for a recommendation from your friends. Especially from someone who recently had his water tank cleaned. After all there is no better recommendation than from a person who you can completely trust. And aside from that, you may even inspect if the cleaners actually did a thorough job.