Body shops and glass shops can be, and have been, held liable when they don't follow the vehicle manufacturers replacement recommendations. Some shops don't even use urethane. To cut corners and save money they use things like silicon, bathtub caulking, and various types of adhesives that we don't even recognize to hold the windshields in place. The most common is Butyl. Butyl was used in the early 1970's but it is only a sealant not an adhesive and it never cures.
Butyl is half the cost of urethane.
But with Butyl there is no strength, it just pulls apart. There are no government regulations which require an autoglass installer be certified or trained. To combat lack of training the National Glass Association in the United States established a certification program. Also, the glass division of the Ford Motor Company , called Carlite, holds one week installation schools throughout the year which are available free to anyone working within the industry. So if you have a windshield that needs to be replaced, try to get it replaced the same way the car-maker installed it.