... technology, silent cracking tech is with safety, non-noising, non-shaking, non- slungshot, non-smoke of gunpowder and pollution-free. So it ... is provided with security, environmental protection, non-explosibility, commonability and controllability.Mechanism: It will react after ... MPa): 10 Min. (8h); 25 Min. (24h); 35 Min. (48h)Packing:5kgs / bag. Period of validity: 12 months. Non explosive ...