We are happy in a peaceful country, but in certain countries, certain regions, and certain areas of the world, the danger is everywhere. The "September 11 terrorist attacks" in 2001 was no stranger to everyone. In addition to the World Trade Center, the Pentagon was also knocked out of a hole. After the incident, the U.S. government tried its best to fight terrorist attacks. Among them was how to make the wall less easily disintegrated by the explosion. In the Pentagon's restoration, a spray paint called Line-X was used to attract everyone's attention. How exactly can it be chosen by the U.S. military? Line-X is a super elastic material composed of polyurethane and polyurea elastomers. It is sprayed on the surface of the object. Line-X can be quickly dried within 5 seconds after spraying to form a dense and elastic protective layer. Protective effects. In the experiment, it was sprayed on the wall, and the blast would not collapse; spray on the eggs, watermelon, and fell to the ground will not be broken; sprayed on the car bumper, how can there be no pit, is not very powerful ? Why is it OK to spray the Line-X bumper? Uncoated Line-X Plastic Cups Spray Line-X Plastic Cup Spray Line-X Eggs Unpainted Line-X Eggs Unsprayed (left) and Spray Line-X walls contrasted in an explosion Line-X walls do not collapse in explosions LINE-X first appeared in 1988. It was sprayed by the United States Coast Guard on lifeboats and life-saving equipment in 1990. In 2001, LINE-X became the only military anti-explosion-proof elastic coating approved by the Pentagon and completed the first phase of the Pentagon explosion-proof coating project in 2003. LINE-X is widely used in military and maritime fields: explosion-proof shields, bulletproof vests, special vehicles, submarines... In addition, it plays an important role in the fields of construction, petrochemical, medical treatment, water treatment, construction machinery, and food industry.